SOUL Performance Products Weissach-Style Bolt-On Exhaust Tips bring the distinctive motorsports-inspired appearance of the factory Weissach Package exhaust outlets to the Porsche 718 Cayman GT4 RS and 718 Spyder RS in a durable 304L stainless-steel design.
SOUL developed these tips as an alternative to the factory titanium Weissach tips, retaining the aggressive finned appearance while using stainless steel for improved long-term durability through repeated heat cycles and track use.
Two inlet sizes are available. The 2.25-inch version is designed for the factory-style exhaust outlet, while the larger 3-inch version is specifically designed for SOUL exhaust systems and allows the full 3-inch exhaust pathway to continue through the tips without necking the system down at the outlet.
The tips are secured using high-quality AccuSeal clamps for a secure bolt-on installation and are offered in either SOUL's raw Signature Satin finish or a durable Cerakote Matte Black finish.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
A factory Weissach Package is not required.
Choose the inlet size based on the rear exhaust system installed on the vehicle.
Designed for factory-style 2.25-inch exhaust outlets.
Choose this version when retaining the factory rear exhaust system.
This configuration allows owners without factory Weissach tips to add the Weissach-inspired appearance while maintaining compatibility with the OEM-sized exhaust outlet.
Designed for SOUL's flow-optimized 3-inch rear exhaust systems.
Choose this version when using a compatible SOUL exhaust with a 3-inch outlet.
The larger inlet prevents the exhaust from being necked down to the smaller factory tip diameter, allowing the full 3-inch exhaust flow path to continue through the outlet.
SOUL's raw stainless-steel finish provides a clean motorsports-inspired appearance while showcasing the stainless construction of the tips.
A durable Cerakote Matte Black finish provides a darker, more understated appearance while retaining the distinctive Weissach-style shape.
Weissach-inspired finned exhaust tip design
Constructed from 304L stainless steel
Available for factory-style 2.25-inch exhaust outlets
Available for SOUL 3-inch exhaust outlets
3-inch version maintains the full flow area of compatible SOUL exhaust systems
Signature Satin finish available
Cerakote Matte Black finish available
High-quality AccuSeal clamps included
Designed for durability through repeated exhaust heat cycles
Approximately 3.2 lbs per pair including AccuSeal clamps
Factory Weissach titanium tips weigh approximately 3 lbs per pair
Bolt-on installation
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
The factory Weissach Package uses lightweight titanium exhaust tips with the distinctive finned design.
SOUL recreates this appearance using 304L stainless steel with durability as the primary goal. SOUL specifically developed the stainless design to reduce the risk of fin cracking associated with repeated heat cycling of thin titanium components, particularly on vehicles subjected to sustained track use.
At approximately 3.2 lbs per pair including clamps, the SOUL stainless tips remain close in weight to the approximately 3 lb factory Weissach titanium tips.
SOUL Performance Products' Street Package combines its free-flowing Over Axle Pipes with the Valved Exhaust System to transform the sound and exhaust flow of the Porsche 718 Cayman GT4 RS and 718 Spyder RS while retaining the ability to significantly reduce volume when desired.
The factory exhaust contains several restrictions downstream of the engine, including the over-axle assemblies and the undersized rear muffler originally developed around the standard GT4 platform. SOUL replaces these components with an exhaust system engineered around a full 3-inch flow path when equipped with SOUL exhaust tips.
At the rear of the vehicle, SOUL's Valved Exhaust System uses a bespoke X-pipe design to produce a smoother, higher-pitched motorsports-inspired tone with the valves open. With the valves closed, exhaust is routed through a secondary muffled flow path incorporating Helmholtz and anti-drone features to substantially reduce exterior volume and cabin resonance.
The Street Package can be configured with either Competition or Resonated Over Axle Pipes. Competition OAPs provide the greatest overall sound level and lowest restriction, while Resonated OAPs smooth the exhaust tone and further reduce lower-RPM resonance for a more refined overall system.
For owners looking for a significant increase in GT3-derived flat-six sound without sacrificing the ability to cruise comfortably, the Street Package provides both aggressive valves-open character and a considerably quieter valves-closed mode.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
Compatible with factory or upgraded headers.
Excludes GT4 RS Clubsport models.
SOUL Valved Exhaust System
Choice of SOUL Competition or Resonated Over Axle Pipes
Choice of OAP heat solution
Choice of SOUL exhaust tips or reuse of factory Porsche tips
New high-grade installation hardware
The Competition OAP configuration is designed for customers looking for the most aggressive sound and lowest restriction from the Street Package.
Non-resonated design
Removes the factory secondary catalytic elements and particulate-filter chambers
Full 3-inch exhaust flow path
Greater overall sound level with the valves open
More aggressive exhaust character
Approximately 11.65 lbs compared with approximately 25 lbs for the factory OAPs
Approximately 13.3 lbs of weight savings
The Resonated OAP configuration provides the same freer-flowing architecture while incorporating resonators to further control sound quality and undesirable frequencies.
Integrated resonators
Removes the factory secondary catalytic elements and particulate-filter chambers
Full 3-inch exhaust flow path
Smoother and more refined exhaust tone
Reduced lower-RPM resonance
Slightly lower overall volume than Competition OAPs
Approximately 16.75 lbs compared with approximately 25 lbs for the factory OAPs
Approximately 8.25 lbs of weight savings
Full 3-inch high-flow pathway
X-pipe exhaust design
Smooth, higher-pitched motorsports-inspired exhaust note
Significantly increased exterior volume
Maximum sound and exhaust flow
Exhaust routed through the secondary muffled flow path
Reduced exterior sound level
Reduced interior resonance
Helmholtz characteristics target undesirable frequencies
Anti-drone design developed around the low-to-mid RPM range
Designed to provide a considerably more comfortable cruising experience
The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS generates substantial exhaust heat, particularly around the tightly packaged Over Axle Pipe section.
SOUL strongly recommends its thermal-management solution to help reduce radiant heat transfer to nearby components and bodywork.
The Street Package can be ordered with either non-heat-shielded Over Axle Pipes or SOUL's optional heat solution.
SOUL's traditional performance exhaust tip design with double-wall construction and a full-size outlet engineered around the 3-inch exhaust system.
Available in:
Signature Satin
Matte Black
A motorsports-inspired stainless-steel tip design influenced by the factory Weissach-style outlets while maintaining the larger flow area of SOUL's exhaust system.
Available in:
Signature Satin
Matte Black
The factory Porsche exhaust tips can also be retained for an OEM appearance.
The factory tips use a smaller inlet diameter, requiring the SOUL exhaust to neck down at the outlet. This creates an additional restriction compared with SOUL's full-size Slash Cut Double Wall or Weissach tips.
Complete Over Axle Pipe and valved rear exhaust package
Choice of Competition or Resonated Over Axle Pipes
Full 3-inch exhaust pathway when used with SOUL exhaust tips
Bespoke X-pipe architecture
Distinct valves-open and valves-closed sound characteristics
Helmholtz and anti-drone design features
Targets drone frequencies in the low-to-mid 2,000 RPM range
Competition OAP configuration provides maximum Street Package volume
Resonated OAP configuration provides a smoother, more refined tone
Optional OAP heat solution
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut brackets
Components manufactured to ISO 9001:2015 standards
Tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
When installed as a cat-back system with the factory catalytic headers retained, the Street Package does not trigger a check engine light on North American-market vehicles.
European-market vehicles require ECU tuning.
The Competition and Resonated Over Axle Pipes remove downstream secondary catalyst/filter assemblies, but they do not remove the monitored primary catalytic converters contained within the factory headers.
If the vehicle is also fitted with catless Competition Headers, a check engine light should be expected unless the vehicle is appropriately calibrated.
SOUL Performance Products' Race Exhaust Package combines its Competition Over Axle Pipes with the Race Exhaust System to eliminate two of the primary restrictions in the Porsche 718 Cayman GT4 RS and 718 Spyder RS exhaust system.
The factory over-axle assemblies contain secondary catalytic elements along with particulate-filter chambers that are empty on North American-market cars, while the factory rear muffler retains the smaller tubing architecture carried over from the standard 718 GT4. The SOUL Race Exhaust Package replaces both sections with a free-flowing system engineered around a full 3-inch exhaust pathway.
SOUL's Competition Over Axle Pipes use specially formed oval tubing through the tightly packaged suspension area, allowing the system to preserve its full flow area without reducing tubing diameter.
At the rear, the Race Exhaust System replaces the factory muffler with a purpose-built X-pipe that maintains the 3-inch flow path through the exhaust tips. The result is a sharper, smoother, higher-pitched motorsports-inspired exhaust note with substantially increased volume and reduced restriction.
Customers can choose between non-resonated and resonated configurations. The non-resonated system provides maximum volume and minimum weight, while the resonated version incorporates non-restrictive resonators and anti-drone tubes to reduce undesirable low-frequency resonance while retaining the aggressive character of the system.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
Compatible with factory or upgraded headers.
SOUL Competition Over Axle Pipes
SOUL Race Exhaust System
Choice of resonated or non-resonated Race Exhaust
Choice of Over Axle Pipe heat solution
Choice of Slash Cut Double Wall or Weissach exhaust tips
Choice of Signature Satin or Matte Black tip finish
New high-grade installation hardware
The non-resonated configuration is designed for maximum sound and minimum weight.
Maximum exhaust volume
Full 3-inch flow path
Bespoke X-pipe design
No rear muffler
No resonators
Lightest Race Exhaust configuration
Most aggressive overall sound
Ideal for owners prioritizing sound, weight reduction, and maximum flow
The resonated configuration retains the same high-flow system architecture while adding non-restrictive resonators and anti-drone tubes.
Full 3-inch flow path
Bespoke X-pipe design
Added resonators help smooth the exhaust note
Anti-drone tubes target undesirable low-frequency resonance
Reduced drone compared with the non-resonated configuration
Retains an aggressive motorsports-inspired exhaust character
Better suited for owners looking for additional refinement during street use
The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS produces substantial exhaust heat, particularly around the tightly packaged Over Axle Pipe section.
SOUL strongly recommends adding a thermal-management solution to the Competition Over Axle Pipes to help protect nearby components and bodywork.
The package can therefore be ordered with either non-heat-shielded Over Axle Pipes or SOUL's heat solution.
SOUL's traditional performance exhaust tip design featuring a double-wall construction and full-size outlet designed to maintain the 3-inch exhaust pathway.
Available in:
Signature Satin
Matte Black
A motorsports-inspired stainless-steel exhaust tip design influenced by the factory Weissach-style outlets while maintaining the larger diameter required by SOUL's full 3-inch exhaust system.
Available in:
Signature Satin
Matte Black
Complete Over Axle Pipe and rear exhaust package
Full 3-inch exhaust pathway
Competition Over Axle Pipes remove the factory secondary catalytic elements
Removes the factory particulate-filter chambers
Specially formed oval OAP tubing maintains flow through tight chassis clearances
Race Exhaust replaces the restrictive factory rear muffler
Bespoke X-pipe produces a smoother, higher-pitched exhaust character
Choice of resonated or non-resonated configuration
Optional Over Axle Pipe heat solution
Approximately 39.15 lbs for the non-resonated package compared with approximately 59 lbs for the corresponding factory components
Approximately 19.85 lbs of weight savings in the non-resonated configuration
No check engine light expected on North American-market vehicles when used with factory catalytic headers
ECU tuning required for European-market vehicles
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut brackets
Components manufactured to ISO 9001:2015 standards
Tolerances of approximately ±0.003 inch
Fixture-built to prevent warping and maintain consistent fitment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
SOUL Performance Products Performance Packages provide a comprehensive exhaust solution for the Porsche 718 Cayman GT4 RS and 718 Spyder RS, combining upgraded headers, Over Axle Pipes, and a valved rear exhaust into a complete system engineered around the GT3-derived 4.0-liter flat-six.
Every package begins with SOUL Competition Headers, replacing the restrictive factory header assemblies with a fully catless design utilizing longer primary tubing and enlarged merge collectors. From there, customers can choose between the fully catless Competition configuration or the high-flow catted Street configuration.
At the rear of the vehicle, SOUL's Valved Exhaust System replaces the factory muffler with a full-flow X-pipe design featuring two distinct operating modes. With the valves open, exhaust flows through the unrestricted 3-inch pathway for a smoother, higher-pitched motorsports-inspired sound. With the valves closed, exhaust is routed through SOUL's muffled secondary pathway, incorporating anti-drone and Helmholtz characteristics to substantially reduce exterior volume and cabin resonance.
When equipped with SOUL exhaust tips, the package maintains a full 3-inch exhaust flow path through the upgraded system. Factory exhaust tips can also be reused, although their smaller inlet requires the system to neck down at the outlets and introduces an additional restriction.
A thermal-management solution for the Over Axle Pipes is included as standard with every Performance Package.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
Does not fit 718 Cayman GT4 RS Clubsport models.
Designed for maximum exhaust flow, sound, and weight reduction.
Includes:
SOUL Competition Headers
SOUL Competition Over Axle Pipes
Over Axle Pipe heat solution
SOUL Valved Exhaust System
Selected exhaust tip configuration
The Competition Package removes the factory catalytic converters and utilizes fully catless Competition Over Axle Pipes, creating the most unrestricted configuration available within the SOUL Performance Package lineup.
This configuration is fully catless and will trigger a check engine light unless the vehicle is appropriately calibrated for the modified exhaust system.
This is the package for owners prioritizing maximum sound, minimum restriction, and the most aggressive overall exhaust configuration.
Designed to deliver the flow and sound benefits of the Competition Headers while retaining high-flow monitored catalytic converters farther downstream in the exhaust system.
Includes:
SOUL Competition Headers
SOUL Sport Cat Over Axle Pipes
Integrated high-flow catalytic converters
Over Axle Pipe heat solution
SOUL Valved Exhaust System
Selected exhaust tip configuration
The Competition Headers still remove the factory header-mounted catalytic converters, but SOUL's Sport Cat Over Axle Pipes relocate high-flow monitored catalytic converters into the OAP section.
SOUL states that this configuration does not trigger a check engine light on North American-market vehicles. European-market vehicles require ECU tuning.
The Street Package provides an excellent balance for owners seeking substantial increases in sound and exhaust flow without running the system completely catless.
Valves Open
Full 3-inch high-flow exhaust pathway
Aggressive motorsports-inspired character
Smoother and higher-pitched X-pipe tone
Maximum exhaust volume
Maximum exhaust flow
Valves Closed
Exhaust routed through the muffled secondary pathway
Significantly reduced exterior volume
Reduced cabin resonance
Anti-drone design
Helmholtz characteristics help control undesirable frequencies
Provides a more comfortable cruising mode without sacrificing the aggressive valves-open experience
SOUL offers two upgraded exhaust tip styles for the Performance Package along with the option to reuse the factory tips.
Slash Cut
A more traditional performance exhaust appearance with SOUL's full-size outlet design.
Available in:
Signature Satin
Matte Black
Weissach
A motorsports-inspired design modeled after the factory Weissach-style outlets and constructed from stainless steel.
Available in:
Signature Satin
Matte Black
Reuse OEM
Allows the factory Porsche exhaust tips to be retained for an OEM appearance.
Because the factory tips use a significantly smaller inlet diameter, retaining them requires the SOUL exhaust to neck down at the outlet. This creates additional restriction compared with SOUL's full-size exhaust tips.
For maximum exhaust flow and to preserve the full 3-inch system, SOUL recommends using its upgraded Slash Cut or Weissach tips.
Complete header-to-tip exhaust upgrade
Choice of Competition or Street configuration
Catless Competition Headers included with both packages
Choice of catless Competition OAPs or high-flow Sport Cat OAPs
OAP thermal-management solution included as standard
SOUL Valved Exhaust System included
Full 3-inch exhaust pathway when equipped with SOUL exhaust tips
X-pipe rear exhaust design
Two distinct valves-open and valves-closed sound characteristics
Integrated anti-drone engineering
Helmholtz characteristics utilized in the valves-closed flow path
Longer header primary tubing than the restrictive factory configuration
Enlarged header merge collectors
Proven power and torque improvements through exhaust-flow optimization
Stronger midrange power delivery
Increased throttle response
Increased exhaust volume and character
Compatible with factory exhaust valve operation
Designed and manufactured by SOUL Performance Products
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
Competition Package: Fully catless. A check engine light should be expected unless appropriate ECU calibration is used.
Street Package: Uses catless Competition Headers but relocates monitored high-flow catalytic converters into the Sport Cat Over Axle Pipes. SOUL states that this configuration does not trigger a check engine light on North American-market vehicles. European-market vehicles require ECU tuning.
The presence of catalytic converters or absence of a check engine light does not necessarily indicate compliance with local, state, or federal emissions regulations. Customers are responsible for confirming the legality of the selected configuration for their intended use and jurisdiction.
Already have a SOUL downpipe on your Porsche 718 Boxster or Cayman and want the ability to change between a catted and catless configuration? SOUL Downpipe Conversion Sections allow owners of an existing SOUL downpipe to swap the center section without purchasing an entirely new downpipe assembly. (soulpp.com)
Two configurations are available. The Competition Catless Section replaces the catalytic converter section with a free-flowing straight-through section for maximum exhaust flow, increased turbo sound, and a more aggressive exhaust character. The Sport High-Flow Catalyst Section converts an existing SOUL downpipe to the catted configuration for owners who want to retain a catalytic converter while maintaining the benefits of SOUL's freer-flowing downpipe design. (soulpp.com)
Each section bolts directly into the existing SOUL downpipe, making it possible to change the vehicle's exhaust configuration without replacing the entire assembly. This makes the conversion sections particularly useful for owners whose requirements change over time or who want an alternate configuration for dedicated track use. (soulpp.com)
IMPORTANT: This product is a conversion section only. It does not include a complete downpipe and is designed exclusively for vehicles already equipped with a compatible SOUL Performance Products downpipe.
Fits 2017–2025 Porsche 718 Boxster and Cayman 2.0L and 2.5L turbocharged models equipped with a SOUL downpipe
Designed for use with SOUL Performance Products downpipes only
Does not replace the complete factory downpipe by itself
Bolts directly into an existing SOUL downpipe assembly
Allows an existing SOUL downpipe to be converted between catted and catless configurations
Competition Catless Section provides a completely unrestricted exhaust path through the conversion section
Sport High-Flow Catalyst Section adds SOUL's high-flow catalytic converter section to an existing compatible SOUL downpipe
Provides an alternative to purchasing an entirely new downpipe when changing configurations
Useful as an alternate track configuration for owners of a compatible SOUL downpipe
Installation is reversible, allowing the alternate SOUL section to be reinstalled later
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use (soulpp.com)
The Competition Catless Section removes the catalytic converter from an existing compatible SOUL downpipe, providing the least restrictive exhaust configuration and increasing turbocharger and exhaust sound.
Removing the catalytic converter can trigger a check engine light. SOUL also notes that the substantial increase in exhaust flow created by a catless downpipe can result in boost spikes on the factory calibration. SOUL highly recommends appropriate ECU tuning for improved drivability and to properly take advantage of the increased exhaust flow. (soulpp.com)
The Sport High-Flow Catalyst Section allows an existing compatible SOUL downpipe to be converted back to a catted configuration without replacing the complete downpipe assembly.
This is the more street-oriented configuration for owners who want to retain a catalytic converter while continuing to use the SOUL downpipe architecture. SOUL identifies the corresponding Sport catalyst conversion section under part number POR.718.SCCS.
The catless Competition Section may trigger a check engine light because the factory catalytic converter is removed.
SOUL highly recommends ECU tuning when using the catless configuration. In addition to catalyst-related fault codes, increased exhaust flow can cause boost spikes on a stock calibration. Proper ECU calibration can improve drivability and allow the engine management system to better accommodate the freer-flowing exhaust configuration. (soulpp.com)
These components are not CARB certified and may not be legal for use on emissions-controlled vehicles. The Competition Catless Section removes the catalytic converter and is intended for off-road or closed-course use where legally permitted.
Customers are responsible for ensuring compliance with all applicable local, state, and federal regulations before installation or use.
The SOUL Competition Downpipe replaces the restrictive factory catalytic converter assembly on the turbocharged Porsche 718 Boxster and Cayman with a completely free-flowing, catless exhaust path. Removing the factory catalyst substantially reduces exhaust restriction, allowing the turbocharger to breathe more freely while increasing throttle response, turbocharger sound, and overall exhaust character.
SOUL uses smooth mandrel-bent piping that transitions from approximately 90 mm at the turbo outlet to dual 55 mm outlets, creating a less restrictive path through one of the most critical sections of the exhaust system. The result is noticeably more turbo sound along with a substantial increase in snarling, crackles, and aggression from the exhaust. SOUL describes the system as aggressive without introducing excessive cabin drone.
The Competition Downpipe also removes significant weight from the rear of the vehicle. At approximately 15.25 lbs, the SOUL assembly is approximately 7.1 lbs lighter than the 22.38-lb factory catalytic converter and downpipe assembly.
Because removing the catalytic converter dramatically increases exhaust flow, SOUL strongly recommends ECU tuning with this downpipe. Increased flow can result in boost spikes on an otherwise stock calibration, and catalyst removal may also trigger a check engine light. Proper ECU calibration can address these issues while allowing the engine to take full advantage of the increased exhaust flow.
Fits 2017–2025 Porsche 718 Boxster and Cayman four-cylinder models, including 2.0L and 2.5L turbocharged applications
Completely catless replacement for the factory catalytic converter and downpipe assembly
Removes one of the primary restrictions in the factory turbocharged exhaust system
Smooth mandrel-bent exhaust path transitions from approximately 90 mm at the turbocharger outlet to dual 55 mm outlets
Designed to improve exhaust flow, throttle response, and turbocharger response
Significantly increases turbocharger sound and overall exhaust character
Adds additional snarling, crackles, and aggression to the exhaust note
Weighs approximately 15.25 lbs / 6.9 kg compared with approximately 22.38 lbs / 10.1 kg for the factory components
Saves approximately 7.1 lbs / 3.2 kg versus the factory catalytic converter assembly
Direct bolt-on installation with no cutting or permanent modification required
Fully reversible installation
Constructed from mandrel-bent, thick-wall T304L stainless steel
Each downpipe is quality-checked and fixture-tested prior to shipment to help ensure accurate fitment
New hardware for the two-bolt exhaust flanges is included
Installation instructions included
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
SOUL strongly recommends ECU tuning when installing the Competition Downpipe.
Removing the factory catalytic converter creates a major increase in exhaust flow. On an otherwise stock calibration, SOUL notes that this can result in boost spikes, affecting drivability and preventing the vehicle from fully taking advantage of the increased exhaust flow.
Catalyst removal may also trigger a check engine light. An appropriate ECU calibration can address catalyst-related fault codes and optimize engine operation for the freer-flowing exhaust configuration.
The SOUL Competition Downpipe eliminates the catalytic converter entirely for maximum exhaust flow, greater weight reduction, and a substantially more aggressive exhaust and turbo sound.
The SOUL Sport Catalytic Converter Downpipe retains a high-flow catalytic converter and is designed to provide improved flow and performance without requiring ECU tuning or triggering a check engine light on North American vehicles.
For owners prioritizing maximum flow and a more aggressive exhaust configuration—and who plan to properly calibrate the ECU—the Competition Downpipe is the more performance-focused option. For owners who want to retain a catalytic converter and maintain a more straightforward bolt-on configuration, the Sport Catalytic Converter Downpipe is the more street-oriented choice.
This product removes the factory catalytic converter and is not CARB certified. SOUL states that it may not be legal for use on emissions-controlled vehicles and identifies it as intended for off-road use due to removal of the factory catalytic converter.
Customers are responsible for ensuring compliance with all applicable local, state, and federal regulations before installation or use.
The SOUL Sport Catalytic Converter Downpipe replaces the restrictive factory catalytic converter assembly on the turbocharged Porsche 718 Boxster and Cayman with a freer-flowing, high-flow catalytic converter and optimized stainless steel piping. The result is improved throttle response, stronger midrange performance, increased turbo sound, and a more engaging exhaust note without the fumes or check engine light concerns associated with a fully catless downpipe.
SOUL uses smooth mandrel-bent piping that transitions from approximately 90 mm at the turbo outlet to dual 55 mm outlets, helping reduce restriction through one of the most important sections of the exhaust system. Independent Dynojet testing performed by Growler Motor Labs showed repeatable peak gains of 14 wheel horsepower and 24 lb-ft of torque, with especially noticeable improvement through the midrange.
Unlike SOUL's Competition Downpipe, the Sport Catalytic Converter Downpipe retains a high-flow catalyst. SOUL states that the system is designed to provide additional performance and sound without triggering a check engine light and without requiring an ECU tune on North American vehicles.
The Sport Downpipe is also approximately 4.7 lbs lighter than the factory assembly, making it a useful upgrade for owners looking to improve response, sound, and performance while retaining a catalytic converter and a more street-oriented exhaust configuration.
Fits 2017–2025 North American Porsche 718 Boxster and Cayman four-cylinder models, including 2.0L and 2.5L turbocharged applications
Replaces the restrictive factory catalytic converter and downpipe assembly
High-flow catalytic converter provides increased exhaust flow while retaining a catalytic converter
Smooth mandrel-bent exhaust path transitions from approximately 90 mm to dual 55 mm outlets
Independent Dynojet testing showed peak gains of 14 whp and 24 lb-ft of torque
Provides a noticeable improvement in midrange response and drivability
Increases turbocharger sound and overall exhaust character
Designed to provide additional performance and sound without a check engine light
No ECU tune required for normal operation on North American vehicles
Weighs approximately 17.65 lbs / 8.0 kg compared with approximately 22.38 lbs / 10.1 kg for the factory components
Saves approximately 4.7 lbs / 2.1 kg versus the factory catalytic converter assembly
Direct bolt-on installation with no cutting or permanent modification required
Fully reversible installation
Constructed from mandrel-bent, thick-wall T304L stainless steel
Back-purged TIG welded for proper penetration, strength, and long-term durability
Each downpipe is quality-checked and fixture-tested prior to shipment to help ensure proper fitment
New hardware for the two-bolt exhaust flanges is included
Installation instructions included
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
The SOUL Sport Catalytic Converter Downpipe retains a high-flow catalytic converter and is designed to increase exhaust flow, response, and sound without requiring an ECU tune or triggering a check engine light on North American vehicles.
The SOUL Competition Downpipe removes the catalytic converter entirely for maximum exhaust flow, additional weight reduction, and a more aggressive exhaust note. SOUL strongly recommends ECU tuning with the Competition Downpipe because the large increase in exhaust flow can cause boost spikes, and catalyst removal may trigger a check engine light.
For owners looking for a straightforward performance upgrade while retaining a catalytic converter and factory-like drivability, the Sport Catalytic Converter Downpipe is the more street-oriented option.
The SOUL Valved Exhaust System is designed for Porsche 718 Boxster and Cayman owners who want significantly more exhaust character without sacrificing highway comfort or everyday usability. Rather than simply increasing volume, SOUL developed the system around two distinct exhaust paths, providing a refined muffled path with the valves closed and a freer-flowing 2.5-inch path with the valves open.
With the valves closed, exhaust gases are routed through SOUL's packed mufflers to substantially reduce cabin presence and minimize drone. With the valves open, exhaust gases are allowed to exit through large 2.5-inch piping while the muffler remains acoustically connected to the exhaust path, helping produce a fuller and more robust tone without becoming excessively harsh.
SOUL engineered the system to work equally well with the factory downpipe or a freer-flowing aftermarket downpipe. With additional exhaust modifications, the system delivers increased snarling, crackles, and burbles while the mufflers continue to control unwanted drone throughout the RPM and load range.
For vehicles equipped with factory Porsche Sport Exhaust (PSE), the SOUL system retains factory valve functionality using the existing vacuum controls. Vehicles without PSE use the included SOUL valve controller. The controller can also be used on PSE-equipped cars to provide direct manual control of the exhaust valves independently of Porsche's factory valve strategy.
The result is a versatile exhaust system with two genuinely useful personalities: refined and quiet when desired, and noticeably more aggressive under load with the valves open.
Fits 2017–2025 Porsche 718 Boxster and Cayman four-cylinder models, including 2.0L and 2.5L turbocharged applications
Direct bolt-on replacement for the factory rear exhaust system
Dual-mode valved design provides distinct quiet and aggressive exhaust settings
With the valves closed, exhaust gases are routed through SOUL mufflers packed with durable sound-absorbing material
With the valves open, exhaust gases flow through large 2.5-inch piping for increased volume and a fuller, more aggressive exhaust note
Features 2.5-inch OD over-axle piping
Engineered to minimize undesirable rasp and cabin drone
Designed to work well with either the factory downpipe or an upgraded freer-flowing downpipe
Upgraded downpipes can provide additional exhaust character, including increased snarling, crackles, and burbles
SOUL valve controller kit included
Vehicles without factory Porsche Sport Exhaust require the included controller for exhaust valve operation
PSE-equipped vehicles retain factory valve functionality using the factory vacuum system
Included valve controller can provide full manual valve control on PSE-equipped vehicles
Valve functionality can be controlled using the factory PSE button where equipped, the included controller remotes, or compatible HomeLink buttons
Constructed from mandrel-bent T304L stainless steel tubing
Mufflers feature reinforced casings designed for long-term durability
Each system is quality-checked and fixture-tested prior to shipment to help ensure accurate fitment
Includes installation instructions for straightforward bolt-on installation
Includes SOUL Straight-Cut Single-Wall exhaust tips in Signature Satin
Alternate SOUL tip styles and finishes are available by special request
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured by SOUL Performance Products in Willow Grove, Pennsylvania
Vehicles equipped with factory Porsche Sport Exhaust can retain normal PSE valve operation using the factory vacuum controls. Vehicles without factory PSE use the included SOUL valve controller.
The controller can also be used on PSE-equipped vehicles to provide direct manual control of the exhaust valves rather than relying solely on Porsche's factory valve strategy. Valve operation can be controlled using the supplied remotes and can also be integrated with compatible HomeLink buttons.
This DasMotoring listing includes SOUL Straight-Cut Single-Wall exhaust tips in Signature Satin.
To keep ordering simple, alternate tip finishes and styles are not offered through the standard product options. If you would like a different SOUL tip configuration, contact DasMotoring before ordering and we can confirm availability and pricing.
The SOUL Performance Exhaust uses a fixed, mufflerless design for maximum simplicity, reduced weight, and constant exhaust presence.
The SOUL Valved Exhaust System uses dedicated mufflers and controllable exhaust valves, allowing the driver to substantially reduce exhaust volume when desired. With the valves closed, SOUL describes the system as comparable in cabin volume to factory PSE; under heavy load with the valves open, the system becomes noticeably more aggressive while remaining refined.
For cars with an upgraded downpipe, frequent highway use, or owners concerned about cabin drone, the Valved Exhaust offers significantly greater sound control and flexibility.
The turbocharged Porsche 718 Boxster and Cayman offer impressive performance, but the factory exhaust and extensive sound insulation leave much of the flat-four engine's character hidden from the driver. The SOUL Performance Exhaust replaces the restrictive factory rear exhaust with a lightweight, free-flowing system designed to deliver substantially more sound, turbo character, and engagement on both the street and track.
Unlike a conventional muffled exhaust system, the SOUL Performance Exhaust uses no mufflers or resonators. Exhaust gases flow through 2.5-inch over-axle piping and into a central crossover section, creating a deeper, more aggressive boxer-engine tone with increased turbo noise, bark, and rumble. With an upgraded downpipe, the system becomes considerably more aggressive, with additional crackles and exhaust presence.
SOUL engineered the system for durability as well as sound. Flexible sections in the over-axle piping help isolate engine movement and vibration, while dedicated mounting brackets are used for Manual and PDK cars to improve fitment and reduce unwanted NVH. The complete assembly is constructed from mandrel-bent T304L stainless steel with thick cast flanges and is designed for sustained street and track use.
Fits 2017–2025 Porsche 718 Boxster and Cayman four-cylinder models, including Base, T, S, and turbocharged GTS models
Compatible with both 6-speed Manual and PDK transmissions
Fits both 2.0L and 2.5L turbocharged flat-four engines
Direct bolt-on replacement for the factory rear exhaust system
Mufflerless and resonator-free design provides a substantial increase in exhaust volume and engine character
2.5-inch OD over-axle piping improves exhaust flow through the rear system
Increased turbocharger sound, boxer-engine bark, and exhaust rumble compared with the factory system
Becomes significantly more aggressive when paired with an upgraded downpipe
Weighs approximately 11 lbs less than the factory base exhaust
Weighs approximately 13 lbs less than the factory Porsche Sport Exhaust (PSE) system
Dedicated transmission-specific mounting brackets provide proper fitment for Manual and PDK vehicles
Durable flex sections help accommodate drivetrain movement while reducing transmitted vibration and NVH
Constructed from mandrel-bent T304L stainless steel
Thick cast flanges provide durable exhaust connections
Fixture-tested for accurate fitment prior to shipment
Includes installation hardware and detailed installation instructions
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in Willow Grove, Pennsylvania
PORSCHE SPORT EXHAUST (PSE)
This Performance Exhaust replaces the factory valved PSE rear exhaust with a fixed, free-flowing exhaust system. Vehicles originally equipped with PSE will no longer have exhaust-valve control after installation. For customers who want to retain selectable quiet/loud exhaust operation, consider the SOUL Valved Exhaust System instead.
TIP CONFIGURATION
This DasMotoring listing includes SOUL Straight-Cut Single-Wall exhaust tips in Signature Satin. To keep ordering simple, alternate tip finishes and styles are not offered through the standard product dropdowns. If you would like a different SOUL tip configuration, contact DasMotoring before ordering and we can confirm availability and pricing.
The SOUL Race Exhaust System is the most comprehensive exhaust upgrade downstream of the headers for the naturally aspirated Porsche 718 GT4, Spyder, and GTS 4.0. Rather than replacing only the factory rear muffler or over-axle pipes, this system replaces the complete exhaust path after the headers with a free-flowing 2.5-inch system engineered around maximum flow, substantial weight reduction, and a more aggressive motorsport-inspired exhaust note.
The factory exhaust uses separate over-axle pipes and PSE rear muffler assemblies connected through restrictive 2.25-inch inlet and outlet flanges. SOUL eliminates that interface entirely, maintaining a larger 2.5-inch exhaust path on each side of the vehicle. Longer tubing runs and a purpose-designed X-pipe blend the two banks to create a smoother, higher-pitched flat-six tone reminiscent of earlier naturally aspirated Porsche GT cars.
Two sound configurations are available. The Non-Resonated system is the lightest and most aggressive option, designed for drivers prioritizing maximum sound and weight reduction. The Resonated system incorporates durable race resonators and dedicated drone canisters to refine the exhaust note and reduce cabin resonance while retaining the character and increased flow of the complete Race Exhaust.
SOUL reports independent Dynojet testing performed by Jotech Motorsports on a 718 GT4 showing peak gains of 30.7 wheel horsepower and 16.1 lb-ft of torque, with the gains carrying toward redline. Actual results will vary based on vehicle, conditions, fuel, and additional modifications. SOUL notes that ECU calibration may further take advantage of the increased exhaust flow.
This DasMotoring configuration is designed to reuse the factory Porsche exhaust tips.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Complete exhaust system downstream of the headers, replacing both the factory over-axle pipes and rear muffler assembly
Maintains a 2.5-inch exhaust path on each side rather than the factory system's restrictive 2.25-inch connecting flanges
Purpose-designed X-pipe blends the two exhaust banks for a smoother, higher-pitched flat-six exhaust note
Available in Resonated and Non-Resonated configurations
Non-Resonated configuration prioritizes maximum sound and minimum weight
Resonated configuration incorporates race resonators and drone canisters to refine sound and reduce cabin resonance
Designed to reuse the factory Porsche exhaust tips
No Check Engine Light on North American vehicles
Non-Resonated system weighs approximately 27.5 lbs, saving approximately 29.9 lbs / 13.5 kg compared with the 57.4-lb factory components
Resonated system weighs approximately 39.35 lbs, saving approximately 18.05 lbs / 8.2 kg compared with the factory components
Independent Dynojet testing on a 718 GT4 showed peak gains of 30.7 whp and 16.1 lb-ft of torque
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for proper penetration, strength, and long-term durability
Precision water-jet-cut flanges manufactured to approximately ±0.003-inch tolerances
Fabricated in dedicated thick-gauge fixtures to control heat distortion and maintain accurate fitment
Includes new high-grade installation hardware and four OEM Porsche gaskets
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
NOTE: European-market vehicles use a different exhaust mounting configuration. A European conversion kit is required; European customers should confirm compatibility before ordering.
RACE EXHAUST VS. RACE X-PIPE: The SOUL Race X-Pipe replaces only the factory rear muffler and connects to the existing over-axle pipes. The SOUL Race Exhaust System replaces the entire exhaust system downstream of the headers, eliminating the factory OAP-to-muffler connection and maintaining a larger 2.5-inch exhaust path throughout. Choose the Race Exhaust when maximum flow, weight reduction, and sound are the priority.
The naturally aspirated 4.0L flat-six is one of the defining features of the Porsche 718 GT4, Spyder, and GTS 4.0, but the factory rear muffler significantly limits how much of that character reaches the driver. The SOUL Race X-Pipe Exhaust replaces the factory rear muffler assembly with a lightweight, free-flowing X-pipe designed to deliver a substantially more aggressive, motorsport-inspired exhaust note.
Unlike SOUL's Valved Exhaust System, the Race X-Pipe takes a much simpler approach: remove the restrictive factory rear muffler and create a direct exhaust path through an X-style crossover. Bringing the two exhaust banks together through the X-pipe changes the character of the 4.0L flat-six, producing a sharper, more connected exhaust note that becomes increasingly aggressive as engine speed rises.
The Race X-Pipe connects directly to the factory over-axle pipes, making it an excellent standalone sound upgrade for an otherwise stock exhaust system. It can also serve as the rear section of a more aggressive exhaust combination when paired with SOUL Competition or Resonated Over Axle Pipes and upgraded headers. Because the system replaces the rear muffler rather than the emissions-control components upstream, SOUL states that it does not trigger a check engine light.
This DasMotoring configuration is designed specifically to reuse the factory Porsche exhaust tips, retaining the OEM rear appearance while substantially changing the sound of the car.
DETAILS:
Fits Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Lightweight replacement for the factory rear muffler assembly
X-pipe crossover design delivers a more aggressive, motorsport-inspired 4.0L flat-six exhaust note
Directly mates to the factory over-axle pipes
Compatible with factory or upgraded headers and over-axle pipes
Designed to reuse the factory Porsche exhaust tips
Does not require aftermarket exhaust tips
No Check Engine Light
Does not require ECU tuning for installation
Provides an immediate increase in exhaust character without replacing the factory catalytic converters or over-axle pipes
Can be paired with SOUL Competition or Resonated Over Axle Pipes for a substantially more aggressive complete exhaust configuration
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
RACE X-PIPE VS. VALVED EXHAUST: The SOUL Race X-Pipe is the more aggressive and simplified rear exhaust option, replacing the factory muffler with a lightweight X-pipe focused on maximum sound and motorsport character. Owners who want the ability to significantly reduce exhaust volume when desired should instead consider the SOUL Valved Exhaust System.
The factory headers on the naturally aspirated Porsche 718 4.0L are engineered around packaging, emissions requirements, and mass-production constraints, leaving significant opportunity to improve exhaust flow and sound. SOUL Street Headers replace the factory header assemblies with a purpose-built performance design featuring larger, freer-flowing catalytic converters, optimized runners, and improved collectors to increase flow, sharpen engine response, and bring out more of the 4.0L flat-six exhaust note.
Unlike SOUL Competition Headers, the Street Headers retain catalytic converters, making them the more refined choice for owners who want improved exhaust performance and sound without moving to a fully catless configuration. SOUL uses smoother transitions from the cylinder head into the primary runners, large-radius bends, and performance-oriented collectors with merge spikes to improve the exhaust path through the complete header assembly.
The SOUL Street Headers weigh approximately 24.19 lbs, compared with approximately 25.7 lbs for the factory components. While the weight reduction is modest, the primary benefit of this system is the improved exhaust geometry and reduced restriction provided by the redesigned runners, collectors, and catalytic converter assemblies.
DETAILS:
Fits Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Direct bolt-on replacement for the factory header assemblies
Retains catalytic converters for a more street-oriented configuration than SOUL Competition Headers
Large-diameter, free-flowing catalytic converters designed to reduce exhaust restriction
Optimized cast cylinder-head flanges provide a smoother transition from the exhaust ports into the primary runners
Large-radius primary tubing improves the exhaust path compared with the restrictive geometry of the factory headers
Performance-oriented collectors with merge spikes improve the transition from the individual primary runners into the exhaust system
Designed to improve exhaust flow, throttle response, performance, and flat-six engine tone
Weighs approximately 24.19 lbs / 11.0 kg compared with 25.7 lbs / 11.7 kg for the factory header assemblies
Saves approximately 1.51 lbs / 0.6 kg versus the factory components
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for proper weld penetration, durability, and long-term reliability
Precision water-jet-cut exhaust flanges manufactured to approximately ±0.003-inch tolerances
Fabricated in dedicated fixtures designed to minimize distortion during the welding process and maintain accurate fitment
Includes new high-grade installation hardware and OEM-style three-bolt gaskets
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
STREET VS. COMPETITION HEADERS: SOUL Street Headers retain catalytic converters and are intended for owners looking for increased flow, response, and exhaust character while maintaining a more street-friendly configuration. SOUL Competition Headers eliminate the catalytic converters entirely for maximum exhaust flow, weight reduction, and sound.
The factory headers on the naturally aspirated Porsche 718 4.0L combine restrictive primary tubing, conventional collectors, and large catalytic converters that limit exhaust flow and suppress much of the engine's natural character. SOUL Competition Headers replace the complete factory header and catalyst assemblies with a purpose-built, catless performance design engineered to improve exhaust flow, reduce weight, sharpen engine response, and substantially increase the intensity of the 4.0L flat-six exhaust note.
SOUL developed these headers around smoother transitions from the cylinder head into the primary tubes, large-radius mandrel bends, and performance-oriented collectors with merge spikes. The result is a less restrictive exhaust path designed to improve scavenging and flow while allowing substantially more sound through the remainder of the exhaust system.
Removing the factory catalytic converters also reduces weight and heat concentrated around the engine and exhaust system. The complete SOUL Competition Header assemblies weigh approximately 18.45 lbs, compared with approximately 25.7 lbs for the factory components—a savings of approximately 7.25 lbs.
DETAILS:
Fits Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+), excluding GT4 Clubsport models
Complete catless replacement for the factory header and catalytic converter assemblies
Direct bolt-on installation
Performance-oriented collectors with merge spikes improve the transition from the primary tubes into the exhaust system
Smooth-radius, large-diameter primary tubing designed to improve exhaust flow and engine response
Weighs approximately 18.45 lbs / 8.4 kg compared with approximately 25.7 lbs / 11.7 kg for the factory components
Saves approximately 7.25 lbs / 3.2 kg versus the factory header assemblies
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Cast cylinder-head flanges provide a smooth transition from the exhaust ports into the primary runners
Back-purged TIG welded for strength, weld penetration, and long-term durability
Precision water-jet-cut exhaust flanges manufactured to tolerances of approximately ±0.003 inch
Fabricated in dedicated fixtures designed to control heat during welding and maintain precise fitment
Includes new high-grade installation hardware and OEM-style three-bolt gaskets
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
IMPORTANT: These headers remove the factory catalytic converters and will likely trigger a check engine light without appropriate ECU calibration. SOUL also notes that catalyst removal on 4.0L 718 models may cause a slight idle surge under certain operating conditions due to factory ECU emissions logic. This behavior can be addressed through ECU tuning.
FOR CLOSED-COURSE COMPETITION USE ONLY: This product is not CARB certified and may not be legal for use on emissions-controlled vehicles. Customers are responsible for ensuring compliance with applicable local, state, and federal regulations.
STREET VS. COMPETITION HEADERS: SOUL Street Headers retain catalytic converters and are intended for owners looking for increased flow, response, and exhaust character while maintaining a more street-friendly configuration. SOUL Competition Headers eliminate the catalytic converters entirely for maximum exhaust flow, weight reduction, and sound.
The factory Porsche Sport Exhaust does a respectable job of controlling volume, but the 718 4.0L platform leaves considerable room for improvement in exhaust tone and character. The SOUL Valved Exhaust System replaces the factory rear muffler assembly with a purpose-built valved X-pipe design engineered to give the naturally aspirated 4.0L flat-six a smoother, higher-pitched, and more engaging sound while retaining the ability to quiet the car when desired.
With the valves open, exhaust flow is routed through SOUL's X-pipe configuration, blending the two banks to produce a smoother and more exotic exhaust note. With the valves closed, exhaust is redirected through a dedicated muffled flow path designed to significantly reduce exterior volume and control cabin resonance. The result is two genuinely useful personalities: aggressive and engaging when you want to hear the car, and considerably more subdued when cruising or trying to keep noise to a minimum.
Unlike a simple muffler delete, SOUL specifically engineered this system to work well with additional exhaust modifications. It can be paired with the factory over axle pipes for a refined change in tone, or combined with freer-flowing over axle pipes and headers for a significantly more aggressive complete exhaust system. SOUL specifically targeted the 1,800–3,000 RPM range when developing the muffled flow path to help smooth out undesirable resonance and drone.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Available for both 6-speed manual and PDK transmissions
Designed to reuse the factory Porsche exhaust tips
Retains a true valved exhaust configuration with two distinct sound characteristics
Valves-open flow path utilizes an X-pipe to merge exhaust pulses for a smoother, higher-pitched flat-six tone
Valves-closed operation routes exhaust through a dedicated SOUL muffler system for reduced exterior volume and improved cruising refinement
Internal muffler design incorporates straight-through perforated tubing and an additional internal crossover to help smooth exhaust flow and control resonance
Specifically engineered to reduce unwanted resonance and drone in the approximately 1,800–3,000 RPM range
Works well with factory over axle pipes or aftermarket OAPs and headers
Weighs approximately 37 lbs, similar to the factory Porsche Sport Exhaust system
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for strength, weld quality, and long-term durability
Precision water-jet-cut components manufactured to tight tolerances for consistent fitment
Built in dedicated fixtures to minimize distortion during welding and ensure proper installation
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
NOTE: European-market vehicles use a different exhaust mounting arrangement. SOUL offers a European conversion solution separately; European customers should confirm compatibility before ordering.
The factory over axle pipes on the naturally aspirated 718 4.0L cars contain dense particulate filters that restrict exhaust flow and significantly mute the sound and character of the engine. SOUL Competition Over Axle Pipes replace these restrictive factory sections with a free-flowing, full 2.25-inch stainless steel design, reducing weight and allowing considerably more of the 4.0L flat-six exhaust note to come through.
Unlike SOUL's Resonated Over Axle Pipes, the Competition OAPs eliminate the factory particulate filters without adding resonators back into the exhaust path. The result is a more direct and aggressive increase in exhaust volume and character. For owners looking to maximize sound while retaining the factory headers and rear exhaust—or building a more aggressive complete exhaust system—the Competition OAPs are the more performance-focused choice.
At just approximately 12.3 lbs for the pair, the Competition OAPs remove approximately 10.9 lbs from the rear of the car compared with the 23.2-lb factory components. SOUL's one-piece construction, large-radius mandrel bends, and precise fixturing provide a true bolt-on upgrade suitable for both street and track use.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Full 2.25-inch one-piece exhaust path with large-radius mandrel bends
Removes the restrictive particulate filters found in the factory over axle pipes
Non-resonated design provides a more aggressive exhaust note than SOUL Resonated Over Axle Pipes
Compatible with factory or upgraded headers and rear exhaust systems
No check engine light on North American vehicles
Weighs approximately 12.3 lbs compared with 23.2 lbs for the factory components
Saves approximately 10.9 lbs / 4.9 kg versus the factory over axle pipes
Constructed from durable .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for strength, consistency, and long-term durability
Precision water-jet-cut brackets and fixtured construction for accurate bolt-on fitment
New high-grade installation hardware included
Optional embossed 321 stainless steel heat shielding available for additional thermal management
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
The factory over axle pipes on the naturally aspirated 718 4.0L cars contain restrictive particulate filters that significantly mute the sound and character of the engine. SOUL Resonated Over Axle Pipes replace these restrictive factory sections with a free-flowing, full 2.25-inch stainless steel design to improve exhaust flow, reduce weight, and let more of the flat-six character come through.
Compared with SOUL Competition Over Axle Pipes, the integrated straight-through resonators take the edge off the additional volume while helping control rasp, low-RPM resonance, and cabin drone. This makes the Resonated OAPs an excellent choice for a street-driven GT4, Spyder, or GTS 4.0—especially when paired with aftermarket headers or a more aggressive rear exhaust.
The result is a more refined exhaust upgrade that removes one of the major restrictions in the factory system without making the car excessively loud. For owners looking for more sound and performance while retaining excellent street manners, the Resonated OAPs offer a great balance.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Full 2.25-inch one-piece exhaust path with large-radius mandrel bends
Integrated straight-through resonators help reduce rasp, drone, and low-RPM resonance
Compatible with factory or upgraded headers and rear exhaust systems
No check engine light on North American vehicles
Weighs approximately 13.8 lbs / 6.3 kg compared with 23.2 lbs / 10.5 kg for the factory components
Saves approximately 9.4 lbs / 4.2 kg versus the factory over axle pipes
Constructed from durable .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for strength, consistency, and long-term durability
Precision-fit brackets and fixtured construction for bolt-on fitment
New high-grade installation hardware included
Optional embossed 321 stainless steel heat shielding available for additional thermal management
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
NOTE: Most European-market vehicles use additional monitored ports on the factory over axle pipes. European customers should confirm compatibility before ordering.
SOUL Performance Products' Valved Exhaust System transforms the sound and exhaust flow of the Porsche 718 Cayman GT4 RS and 718 Spyder RS while retaining two genuinely distinct operating modes for aggressive driving and quieter cruising.
The factory GT4 RS rear muffler utilizes tubing measuring less than 2.25 inches, creating a restriction for the GT3-derived 4.0-liter flat-six. SOUL replaces this section with a purpose-built exhaust featuring a full 3-inch valves-open flow path and a bespoke X-pipe designed to produce a smoother, throatier, higher-pitched motorsports-inspired exhaust note.
With the valves open, exhaust flows through the high-flow X-pipe pathway for maximum sound and minimal restriction. With the valves closed, exhaust is redirected through SOUL's specially developed muffled secondary pathway. Straight-through perforated tubing, an internal X-pipe, muffler packing, and Helmholtz resonators work together to reduce exterior volume and control cabin resonance.
SOUL specifically developed the system to address drone between approximately 1,800 and 3,000 RPM, producing a meaningful difference between the valves-open and valves-closed modes without sacrificing the character of the 4.0-liter engine.
IMPORTANT: This Valved Exhaust System is NOT compatible with the factory Over Axle Pipes. Aftermarket Over Axle Pipes are required for installation.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
Does not fit:
Porsche 718 Cayman GT4 RS Clubsport
Required for installation:
SOUL Competition Over Axle Pipes
SOUL Resonated Over Axle Pipes
SOUL Sport Cat Over Axle Pipes
Or another compatible aftermarket Over Axle Pipe system
This exhaust will not fit with the factory Over Axle Pipes.
Compatible with factory or upgraded headers when used with compatible aftermarket Over Axle Pipes.
The valves-open configuration is designed for maximum sound, flow, and exhaust character.
Full 3-inch exhaust pathway
Bespoke X-pipe design
Smooth, higher-pitched exhaust note
Increased exterior volume
Increased cabin presence
Reduced restriction compared with the factory rear muffler
Aggressive GT3-inspired motorsports character
With the valves closed, exhaust is redirected through SOUL's secondary muffled pathway.
Substantially reduced exterior volume
Reduced cabin resonance and drone
Straight-through perforated internal muffler tubing
Internal secondary X-pipe
Helmholtz resonators
Specifically engineered to smooth drone in the approximately 1,800–3,000 RPM range
Designed to provide a more comfortable cruising experience
The result is a true mild-to-wild exhaust system with two distinct sound characteristics.
SOUL incorporated advanced anti-drone components into the Valved Exhaust System that occupy additional space around the rear exhaust assembly.
Because of this packaging, the system physically cannot be installed with the factory Over Axle Pipes.
The Valved Exhaust must therefore be paired with compatible aftermarket Over Axle Pipes, including SOUL Competition, Resonated, or Sport Cat Over Axle Pipes.
Customers looking for a complete OAP and Valved Exhaust solution should consider the SOUL Street Package.
SOUL's traditional performance exhaust tip design featuring double-wall construction and an outlet designed to complement the full 3-inch exhaust system.
Available in:
Signature Satin
Matte Black
A motorsports-inspired stainless-steel exhaust tip design influenced by the factory Weissach-style outlets while maintaining the larger flow area of SOUL's exhaust system.
Available in:
Signature Satin
Matte Black
The factory Porsche exhaust tips can also be retained for customers who prefer the original appearance.
Because the factory tips have a significantly smaller inlet diameter, using them requires the SOUL exhaust to neck down at the outlet. This introduces additional restriction compared with SOUL's full-size Slash Cut Double Wall or Weissach tips.
For maximum exhaust flow, SOUL recommends its larger aftermarket exhaust tips.
Valved rear exhaust replacement
Full 3-inch valves-open exhaust pathway
Bespoke X-pipe architecture
Two distinct exhaust modes
Higher-pitched and smoother valves-open exhaust character
Significantly reduced sound with valves closed
Straight-through muffler construction
Internal secondary X-pipe
Helmholtz resonators
Anti-drone engineering targeting approximately 1,800–3,000 RPM
Requires aftermarket Over Axle Pipes
Not compatible with factory Over Axle Pipes
Choice of Slash Cut Double Wall, Weissach, or factory OEM exhaust tips
Constructed from 0.065-inch-wall T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Water-jet-cut mounting brackets
Brackets manufactured to ISO 9001:2015 standards
Approximately ±0.003-inch manufacturing tolerances
Fabricated in heavy-duty fixtures to minimize heat distortion during welding
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
The Valved Exhaust System provides separate valves-open and valves-closed exhaust paths.
SOUL's optional Valve Controller Kit can be used to provide greater control over valve operation and maintain the desired exhaust mode throughout the engine's rev range.
The Valve Controller Kit is not included with the exhaust system unless purchased separately.
DasMotoring Notes
This is the best SOUL rear exhaust choice for GT4 RS and Spyder RS owners who want more sound and performance potential without going to a fixed-volume race exhaust. If you want the car to have two personalities — louder and more aggressive with the valves open, calmer with the valves closed — this is the setup to choose.
Because this system is not compatible with factory over-axle pipes, make sure your build includes SOUL Competition Over Axle Pipes, SOUL Sport Cat Over Axle Pipes, or another compatible aftermarket over-axle pipe option.
SOUL allows this system to be configured with OEM exhaust tips, but the factory tips have a smaller inlet diameter. Reusing the OEM tips requires the system to neck down near the tips, which creates a restriction. For best performance and flow, DasMotoring recommends selecting SOUL’s matching high-flow tips instead of reusing the factory tips.
SOUL Performance Products' Race Exhaust System replaces the restrictive factory rear muffler on the Porsche 718 Cayman GT4 RS and 718 Spyder RS with a lightweight, free-flowing X-pipe exhaust designed to bring out the motorsports character of the GT3-derived 4.0-liter flat-six.
Although the GT4 RS produces substantially more power than the standard GT4, Porsche retained a rear muffler architecture with tubing measuring less than 2.25 inches. SOUL replaces this section with a full 3-inch exhaust path from the inlet flanges through the exhaust tips, reducing restriction while dramatically changing the character of the exhaust note.
A bespoke X-pipe merges the exhaust pulses to create a smoother, sharper, higher-pitched tone reminiscent of Porsche's motorsports applications. Unlike the factory valved muffler, the Race Exhaust uses a single unrestricted flow path for a consistently aggressive sound.
The system is available in Non-Resonated and Resonated configurations, allowing customers to choose between maximum volume and weight reduction or additional control of low-RPM resonance.
Fits:
Porsche 718 Cayman GT4 RS – 2022+
Porsche 718 Spyder RS – 2024+
Designed as a rear exhaust replacement for the 718 GT4 RS / Spyder RS platform.
Can be installed as a standalone rear exhaust upgrade or combined with upgraded Over Axle Pipes and headers for a more comprehensive exhaust system.
Does not fit 718 GT4 RS Clubsport models.
The Non-Resonated Race Exhaust is designed for owners seeking maximum sound, minimum restriction, and the greatest weight reduction.
Full 3-inch exhaust flow path
Bespoke X-pipe design
No rear muffler
No resonators
Maximum exhaust volume
Sharp, high-pitched motorsports-inspired tone
Approximately 27.5 lbs
Approximately 6.5 lbs lighter than the 34 lb factory rear exhaust
Lightest Race Exhaust configuration
The Resonated Race Exhaust retains the same free-flowing architecture while incorporating non-restrictive resonators and anti-drone tubes.
Full 3-inch exhaust flow path
Bespoke X-pipe design
Non-restrictive resonators
Anti-drone tubes target undesirable frequencies below approximately 2,500 RPM
Reduced low-RPM resonance compared with the Non-Resonated configuration
Smoother and more refined overall exhaust character
Retains the aggressive high-RPM sound of the Race Exhaust
The Resonated configuration is ideal for owners who want the character and flow of the Race Exhaust while reducing some of the resonance associated with a completely non-resonated system.
SOUL's traditional performance exhaust tip featuring double-wall construction and a full-size outlet designed around the 3-inch Race Exhaust.
Available in:
Signature Satin
Matte Black
A motorsports-inspired stainless-steel exhaust tip influenced by the factory Weissach-style outlets while maintaining the larger flow area of SOUL's 3-inch exhaust system.
Available in:
Signature Satin
Matte Black
Replaces the factory rear muffler
Full 3-inch exhaust flow path from the inlet flanges through SOUL exhaust tips
Bespoke X-pipe design
Higher-pitched, smoother motorsports-inspired exhaust note
Choice of Non-Resonated or Resonated configuration
Resonated version incorporates non-restrictive resonators and anti-drone tubes
Non-Resonated system weighs approximately 27.5 lbs
Factory rear exhaust weighs approximately 34 lbs
Approximately 6.5 lbs / 2.9 kg weight savings in Non-Resonated configuration
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut brackets
Components manufactured to ISO 9001:2015 standards
Tolerances of approximately ±0.003 inch
Fixture-built to minimize warping and maintain dimensional accuracy
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
Factory Rear Exhaust
Less than 2.25-inch internal flow path
Valved factory muffler design
Approximately 34 lbs
Quieter overall sound
Greater exhaust restriction
SOUL Race Exhaust
Full 3-inch flow path
Free-flowing X-pipe architecture
No exhaust valves
Approximately 27.5 lbs in Non-Resonated configuration
Approximately 6.5 lbs lighter than factory
Significantly more aggressive exhaust volume
Smoother, higher-pitched exhaust character
Choice of Non-Resonated or Resonated configuration
The SOUL Sport Header Package is a complete header and catted over-axle pipe upgrade for the Porsche 718 Cayman GT4 RS and 718 Spyder RS. This package combines SOUL Competition Headers with SOUL Sport Cat Over Axle Pipes, giving the car a major improvement in sound, response, and exhaust flow while still retaining catalytic converters in the over-axle section.
For the GT4 RS and Spyder RS platform, SOUL chose not to compromise the header design with a catted header replacement. Instead, this package uses unrestricted Competition Headers paired with high-flow catted over-axle pipes. The headers maximize the available space with longer tubing and an expanded merge collector, while the Sport Cat Over Axle Pipes replace the factory over-axle / particulate filter section with a freer-flowing catted design.
The result is one of the best balanced exhaust upgrades for the GT4 RS and Spyder RS: more character, sharper response, better flow, and a more aggressive sound without moving to a fully catless over-axle setup.
Fitment
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Does not fit 718 GT4 Clubsport models.
What’s Included
SOUL Competition Headers
SOUL Sport Cat Over Axle Pipes
Heat solution for the Sport Cat Over Axle Pipes
New high-grade installation hardware
OEM three-bolt gaskets where applicable
Key Features
SOUL part number: POR.718GT4RS.SPPKG
DasMotoring SKU: DM-SOUL-718RS-SPPKG
Complete header and catted over-axle package for the GT4 RS / Spyder RS
Combines SOUL Competition Headers with SOUL Sport Cat Over Axle Pipes
Retains catalytic converters in the over-axle section
Designed to increase sound, response, and exhaust flow
Header design uses longer tubing and an expanded merge collector
Sport Cat Over Axle Pipes use high-flow catalytic converters
Sport Cat Over Axle Pipes include heat solution as standard
Works with the factory rear exhaust or an upgraded rear exhaust system
Built from mandrel-bent .065" wall T304L stainless steel
Back-purged TIG welded for strength and longevity
Waterjet-cut flanges manufactured to ISO 9001:2015 standards
Designed and built in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL’s lifetime warranty
DasMotoring Notes
This is the package I would recommend for GT4 RS and Spyder RS owners who want a serious exhaust upgrade while keeping catalytic converters in the system. Compared with only changing the over-axle pipes, this package also opens up the header section, giving the car a more complete change in sound, response, and flow.
For maximum sound and flow, consider the SOUL Competition Headers paired with SOUL Competition Over Axle Pipes instead. For a more street-conscious setup that still delivers a big jump in character, this Sport Header Package is the better choice.
SOUL states that the Sport Cat Over Axle Pipes are not expected to trigger a check engine light on North American cars, while European-market cars require ECU tuning. Emissions requirements vary by location and vehicle use, so please confirm local requirements before ordering.
SOUL Performance Products Competition Headers are a fully catless header solution developed to maximize exhaust flow, sound, power, and response from the GT3-derived 4.0-liter flat-six in the Porsche 718 Cayman GT4 RS and 718 Spyder RS.
Rather than compromise runner length and collector design to package catalytic converters within the replacement headers, SOUL utilizes the available space for longer primary tubing and an enlarged merge collector. The outlet transitions into the full 3-inch flow path used by the GT4 RS / Spyder RS over-axle exhaust system.
Removing the factory catalytic converters significantly reduces restriction at the front of the exhaust system and allows considerably more of the engine's natural exhaust character to come through. The Competition Headers can be paired with the factory over-axle pipes or used as the foundation of a more comprehensive SOUL exhaust system.
The complete SOUL header assembly weighs approximately 17.75 lbs compared with approximately 22.2 lbs for the factory headers, reducing weight by approximately 4.5 lbs while providing a freer-flowing exhaust path.
These headers are catless and will trigger a check engine light when installed without appropriate ECU calibration.
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Does not fit 718 GT4 RS Clubsport models.
Compatible with:
Factory Over Axle Pipes
SOUL Resonated Over Axle Pipes
SOUL Competition Over Axle Pipes
SOUL Sport Cat Over Axle Pipes
Factory rear exhaust
Upgraded rear exhaust systems
Fully catless competition header design
Removes the factory catalytic converters
Longer primary tubing made possible by eliminating the factory catalytic converter assemblies
Enlarged merge collectors
Designed to transition into the 3-inch flow path of the over-axle exhaust system
Increased exhaust sound, flow, power potential, and throttle response
Direct bolt-on installation
Compatible with factory or upgraded Over Axle Pipes
SOUL header weight: approximately 17.75 lbs
Factory header weight: approximately 22.2 lbs
Weight savings: approximately 4.5 lbs / 2 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Cast cylinder-head flanges provide a smooth transition from the exhaust ports into the runners
Precision water-jet-cut exhaust flanges
Exhaust flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked prior to shipment
New high-grade installation hardware included
OEM three-bolt gaskets included
Designed and built in-house in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
These Competition Headers remove the factory catalytic converters entirely.
Installation will trigger a check engine light due to the removal of the factory catalysts unless the vehicle is appropriately calibrated to accommodate the catless exhaust configuration.
Customers should verify all applicable emissions and vehicle-use regulations before installation. Catless exhaust components may not be legal for emissions-controlled street vehicles in all jurisdictions.
The Competition Headers can be installed while retaining the factory Over Axle Pipes, allowing the headers to serve as a standalone upgrade.
For a more comprehensive exhaust system, they can also be paired with SOUL's upgraded Over Axle Pipes:
SOUL Sport Cat Over Axle Pipes
Adds high-flow catalytic converters farther downstream in the exhaust system
Provides a modular option for owners who want SOUL Competition Headers while retaining catalytic converters within the exhaust system
Includes a thermal-management solution
SOUL Resonated Over Axle Pipes
Catless configuration
Integrated resonators help smooth the overall exhaust tone
Substantial increase in sound while remaining more refined than the Competition OAP configuration
SOUL Competition Over Axle Pipes
Fully catless configuration
Maximum reduction in exhaust restriction
Lightest and most aggressive SOUL Over Axle Pipe option
Produces the most aggressive overall configuration when paired with Competition Headers
SOUL Performance Products Sport Cat Over Axle Pipes offer a unique solution for Porsche 718 Cayman GT4 RS and 718 Spyder RS owners looking for increased sound and performance while retaining monitored catalytic converters in the exhaust system.
Rather than replacing the factory headers with a catted header design, SOUL relocates the high-flow catalytic converters to the over-axle section. This modular approach allows the Sport Cat Over Axle Pipes to be used with the factory headers or paired with SOUL Competition Headers for a more comprehensive exhaust upgrade.
As a standalone upgrade, the Sport Cat Over Axle Pipes replace the factory particulate-filter assemblies with a freer-flowing design incorporating high-flow catalytic converters. The result is increased exhaust sound and reduced restriction while retaining catalytic converters downstream in the exhaust system.
For a more aggressive configuration, pairing the Sport Cat Over Axle Pipes with SOUL Competition Headers removes the factory catalytic converters at the headers while retaining the monitored high-flow catalytic converters within the over-axle pipes.
Because catalytic converters generate considerable heat, SOUL includes its heat solution as standard equipment with every set of Sport Cat Over Axle Pipes.
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Compatible with factory or upgraded headers.
Compatible with factory or upgraded rear exhaust systems.
High-flow catalytic converters integrated into the over-axle pipes
Replaces the factory particulate-filter assemblies
Provides increased exhaust sound and improved exhaust flow
Allows retention of monitored catalytic converters when paired with SOUL Competition Headers
Compatible with factory headers
Compatible with SOUL Competition Headers
Compatible with factory or upgraded rear exhaust systems
Heat solution included as standard
SOUL system weight: approximately 18.7 lbs
Factory over-axle pipe weight: approximately 25 lbs
Weight savings: approximately 6.3 lbs / 2.86 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut flanges
Flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked and fixture tested prior to shipment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
No check engine light expected on North American-market vehicles
ECU tuning required for European-market vehicles
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
SOUL developed the Sport Cat Over Axle Pipes as an alternative to using catalytic converters within replacement headers.
With the factory headers retained, the Sport Cat Over Axle Pipes add high-flow catalytic converters while replacing the factory particulate-filter section.
When combined with SOUL Competition Headers, the factory header-mounted catalytic converters are removed and the high-flow catalytic converters within the Sport Cat Over Axle Pipes remain in the exhaust system.
This gives GT4 RS and Spyder RS owners the ability to build the exhaust system in stages while maintaining compatibility between the factory and SOUL components.
SOUL Sport Cat Over Axle Pipes
High-flow catalytic converters included
Approximately 18.7 lbs
Approximately 6.3 lbs lighter than the factory over-axle pipes
Heat solution included as standard
Designed for owners who want increased sound and flow while retaining catalytic converters
Can be paired with factory or SOUL Competition Headers
SOUL Competition Over Axle Pipes
Catless over-axle design
Approximately 11.65 lbs
Approximately 13.3 lbs lighter than factory
More aggressive reduction in exhaust restriction
Greater weight savings
Optional heat solution
Unlock substantially more sound from the GT3-derived 4.0-liter flat-six with the SOUL Performance Products Competition Over Axle Pipes for the Porsche 718 Cayman GT4 RS and 718 Spyder RS.
The factory over-axle assemblies contain secondary catalytic elements as well as particulate-filter chambers that are empty on North American-market cars. SOUL removes these restrictions and replaces the factory assemblies with a free-flowing design engineered to maintain a full 3-inch exhaust path from flange to flange.
Packaging around the rear suspension and bodywork is extremely tight on the 718 RS platform. Rather than reducing tubing diameter through these areas, SOUL utilizes specially formed oval tubing to preserve cross-sectional flow area while maintaining the necessary chassis clearance.
The result is a dramatically more direct exhaust path, substantially increased exhaust volume, and a significant reduction in weight. The SOUL Competition Over Axle Pipes weigh approximately 11.65 lbs compared with approximately 25 lbs for the factory assemblies, saving roughly 13.3 lbs from the rear of the vehicle.
For owners looking for one of the most significant single-component sound upgrades available for the GT4 RS or Spyder RS, the Competition Over Axle Pipes deliver increased volume and character while retaining compatibility with the factory headers and rear exhaust.
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Compatible with factory or upgraded headers.
Compatible with factory or upgraded rear exhaust systems.
Full 3-inch exhaust flow path from flange to flange
Removes the factory secondary catalytic elements
Removes the factory particulate-filter chambers
Specially formed oval tubing maintains exhaust flow through tight suspension and body clearances
SOUL system weight: approximately 11.65 lbs
Factory over-axle pipe weight: approximately 25 lbs
Weight savings: approximately 13.3 lbs / 6 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut flanges
Flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked and fixture tested before shipment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
No check engine light expected on North American-market vehicles
ECU tuning required for European-market vehicles
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS produces considerable exhaust heat, particularly in the tightly packaged over-axle area.
Although the simplified Competition Over Axle Pipe design removes much of the heat-soaking mass found in the factory assemblies, SOUL strongly recommends the use of a thermal-management solution to help protect nearby components and bodywork.
The Competition Over Axle Pipes are available with or without SOUL's optional heat solution.
Factory Over Axle Pipes
Approximately 25 lbs
Secondary catalytic elements remain in the exhaust path
Factory particulate-filter chambers remain in place
Factory exhaust routing and construction
SOUL Competition Over Axle Pipes
Approximately 11.65 lbs
Approximately 13.3 lbs / 6 kg lighter than factory
Secondary catalytic elements removed
Particulate-filter chambers removed
Full 3-inch exhaust path from flange to flange
T304L stainless-steel construction
Significantly increased exhaust sound
Optional thermal-management solution
SOUL Performance Products Resonated Over Axle Pipes deliver a substantial increase in exhaust sound and flow for the Porsche 718 Cayman GT4 RS and 718 Spyder RS while offering a smoother, more refined tone than the more aggressive Competition Over Axle Pipes.
The factory over-axle assemblies contain secondary catalytic elements and particulate-filter chambers that are empty on North American-market vehicles. SOUL replaces these restrictive assemblies with a freer-flowing design that maintains a full 3-inch exhaust path from flange to flange.
Packaging around the rear suspension and bodywork is extremely tight on the 718 RS platform. Rather than reducing tubing diameter through these areas, SOUL uses specially formed oval tubing to preserve exhaust flow while maintaining the necessary chassis clearance.
Integrated resonators differentiate this system from SOUL's Competition Over Axle Pipes. They reduce overall volume slightly and smooth out some of the more aggressive frequencies, making the Resonated OAPs an excellent option for owners looking for a substantial sound increase without going all the way to the more aggressive Competition configuration.
The SOUL Resonated Over Axle Pipes weigh approximately 16.75 lbs compared with approximately 25 lbs for the factory assemblies, reducing rear-mounted weight by approximately 8.25 lbs.
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Compatible with factory or upgraded headers.
Compatible with factory or upgraded rear exhaust systems.
Full 3-inch exhaust flow path from flange to flange
Integrated resonators reduce overall volume and smooth the exhaust tone compared with SOUL Competition Over Axle Pipes
Removes the factory secondary catalytic elements
Removes the factory particulate-filter chambers
Specially formed oval tubing maintains exhaust flow through tight suspension and body clearances
SOUL system weight: approximately 16.75 lbs
Factory over-axle pipe weight: approximately 25 lbs
Weight savings: approximately 8.25 lbs / 3.74 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut flanges
Flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked and fixture tested before shipment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
No check engine light expected on North American-market vehicles
ECU tuning required for European-market vehicles
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
The GT3-derived 4.0-liter engine in the GT4 RS and Spyder RS generates considerable exhaust heat, particularly within the tightly packaged over-axle area.
Although SOUL's streamlined Resonated Over Axle Pipe design removes much of the mass and associated heat soak of the factory assemblies, SOUL strongly recommends a thermal-management solution to help protect nearby components and bodywork.
The Resonated Over Axle Pipes are available either without a heat solution or with SOUL's optional heat solution.
SOUL Resonated Over Axle Pipes
Integrated resonators
Smoother and slightly quieter than the Competition OAPs
Reduces some of the aggressive frequencies of the Competition configuration
Full 3-inch exhaust path
Approximately 16.75 lbs
Approximately 8.25 lbs lighter than factory
Optional heat solution
Ideal for owners looking for substantially more exhaust character while retaining a more refined overall tone
SOUL Competition Over Axle Pipes
Non-resonated design
More aggressive overall volume and tone
Full 3-inch exhaust path
Approximately 11.65 lbs
Approximately 13.3 lbs lighter than factory
Optional heat solution
Ideal for owners seeking maximum sound and minimum weight
Designed to fit:
2020+ Porsche Cayman GT4/ GT4RS
2020+ Porsche Boxster Spyder/ Spyder RS
2021+ Porsche Cayman GTS (4.0)
2021+ Porsche Boxster GTS (4.0)
Product description:
CARGRAPHIC performance 2-Mode Exhaust Valve Control Unit - Version for vacuum exhaust valves
Consisting of:
CARGRAPHIC performance exhaust valve control unit
Wiring set for connection to vacuum valves and Pierburg solenoid, first generation with square connector
Adapter wiring
2x CARGRAPHICremote controls
Export Version - Motorsport use only - No approval for use under road traffic regulations
Features:
Factory control function remains active
Connection using OEM plugs
Easy installation
Traceless removal
Full control of your exhaust valves
High quality remote controls with CARGRAPHIC logo
Programmable start mode - engine start with open or closed exhaust valves
How it works:
The CARGRAPHIC valve control unit is installed between the exhaust valves and the factory control unit. It takes over / overlays the control function of the standard control unit and operates with 2 modes:
SPORT mode: valves always open
AUTOMATIC mode: factory control is reactivated
PERFORMANCE - Made in Germany
Attention:
Example pictures - Actual product may vary depending on model version.
Fitting notes:
Thanks to the original plug-and-play connectors, the valve control unit can be connected quickly. For safe and long-term operation, however, the control module & wiring must be mounted in a dry location, protected from heat and splashing water, and the wiring harness must be routed professionally. This requires sound knowledge of automotive electrics and the proper workshop equipment.
Designed to fit:
2020+ Porsche Cayman GT4/ GT4RS
2020+ Porsche Boxster Spyder/ Spyder RS
2021+ Porsche Cayman GTS (4.0)
2021+ Porsche Boxster GTS (4.0)
Product description:
CARGRAPHIC Valve Control Unit to enhance functions of factory exhaust valve system
Consisting of:
CARGRAPHIC valve control unit
Wiring loom to connect with 2 vacuum exhaust valves
2x CARGRAPHIC remote controls
Export Version - Motorsport use only - No approval for use under road traffic regulations
Features:
Factory control remains connected
Easy connection and installation
Traceless deinstallation
Activation of factory valve control unit is always possible
High quality remote controls with CARGRAPHIC logo
How it works:
The CARGRAPHIC valve control unit is installed between the exhaust valves and the factory control unit. It takes over / overlays the control function of the standard control unit and operates with 3 modes:
SPORT mode: valves always open
COMFORT mode: valves always closed
AUTOMATIC mode: factory control is reactivated
PERFORMANCE - Made in Germany
Attention:
Permanent closing of the exhaust valves, especially under full power, can lead to engine damage.
Example pictures - Actual product may vary depending on model version.
Fitting notes:
Thanks to the original plug-and-play connectors, the valve control unit can be connected quickly. For safe and long-term operation, however, the control module & wiring must be mounted in a dry location, protected from heat and splashing water, and the wiring harness must be routed professionally. This requires sound knowledge of automotive electrics and the proper workshop equipment.
We therefore strongly recommend installation by a qualified specialist workshop. Self-installation may lead to malfunctions or vehicle damage and will void any warranty claims.
National and International Regulations and Requirements:
The CARGRAPHIC portfolio includes components that may be affected by national and international emissions regulations. CARGRAPHIC places great importance on providing accurate information about the compliance of our products with the respective regulations and clearly indicating whether they are approved exclusively for racetrack use or also for public road use. However, if there is no specific declaration regarding a product's intended use, CARGRAPHIC makes no assurance regarding its compliance. It is fundamentally the buyer's responsibility to select the appropriate product for the intended purpose and verify whether its use complies with local regulations and requirements. As regulations may change, we recommend regularly visiting our website to ensure the chosen product meets current legal requirements. Make sure that the product is installed according to the installation instructions and operated in compliance with all applicable local regulations.
Designed to fit:
2020+ Porsche Cayman GT4/ GT4RS
2020+ Porsche Boxster Spyder/ Spyder RS
2021+ Porsche Cayman GTS (4.0)
2021+ Porsche Boxster GTS (4.0)
No more waiting for 4,000rpm for your exhaust valves to open up. This is controlled through factory PSE button.
PSE ON = Exhaust valves open 100% of the time
PSE OFF = Exhaust valves are always closed unless engine exceeds 4,000rpm (security feature)
Product description:
CARGRAPHIC Valve Control Unit - 2-Modes / Version for vacuum exhaust valves.
Controlled by factory center console PSE / tailpipe button.
Consisting of:
CARGRAPHIC control unit
Wiring loom to connect
Fits for:
Porsche 718 Boxster GTS 4.0 / Spyder
Porsche 718 Cayman GTS 4.0 / GT4
Porsche 718 Spyder RS
Porsche 718 Cayman GT4 RS
Export Version - Motorsport use only - No approval for use under road traffic regulations
Features:
Convenient and safe operation by factory switch (PSE / tailpipe button in center console)
Factory control remains connected
Quiet engine start possible* (see how it works)
Easy connection and installation
Traceless deinstallation
Get full control of your exhaust valves
Activation of factory valve control unit is always possible
Exhaust valve control unit - how it works:
The CARGRAPHIC valve control unit is installed between the exhaust valves and the factory control unit. The CARGRAPHIC valve control is activated by a combination of buttons in the interior. Subsequently, the 2 operation modes are selected by the PSE / tailpipe button in the center console:
SPORT mode: valves always open
COMFORT mode: valves always closed (security open at 4000 rpm)
The last selected mode is saved even after the engine is switched off and is executed when the engine is started again.
(*only GT4 and Spyder models - not available for GTS)
PERFORMANCE - Made in Germany
Attention:
Please advise if your vehicle is a left- (LHD) or a righthand drive (RHD) model.
Example pictures - Actual product may vary depending on model version.
Fitting notes:
Thanks to the original plug-and-play connectors, the valve control unit can be connected quickly. For safe and long-term operation, however, the control module & wiring must be mounted in a dry location, protected from heat and splashing water, and the wiring harness must be routed professionally. This requires sound knowledge of automotive electrics and the proper workshop equipment.
We therefore strongly recommend installation by a qualified specialist workshop. Self-installation may lead to malfunctions or vehicle damage and will void any warranty claims.
National and International Regulations and Requirements:
The CARGRAPHIC portfolio includes components that may be affected by national and international emissions regulations. CARGRAPHIC places great importance on providing accurate information about the compliance of our products with the respective regulations and clearly indicating whether they are approved exclusively for racetrack use or also for public road use. However, if there is no specific declaration regarding a product's intended use, CARGRAPHIC makes no assurance regarding its compliance. It is fundamentally the buyer's responsibility to select the appropriate product for the intended purpose and verify whether its use complies with local regulations and requirements. As regulations may change, we recommend regularly visiting our website to ensure the chosen product meets current legal requirements. Make sure that the product is installed according to the installation instructions and operated in compliance with all applicable local regulations.
Install Video: https://youtu.be/_mkcxNzM_X8
Click for install article here
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