The SOUL Copper Header Gasket Set provides a complete replacement gasket solution for the exhaust header connections on Porsche 981 Boxster and Cayman models. Designed as a direct replacement for old, worn, or damaged factory gaskets, the kit includes everything needed to reseal both the cylinder-head and downstream exhaust connections when removing or installing headers.
Constructed from approximately 1 mm thick copper, these gaskets provide excellent sealing characteristics and can conform to minor imperfections in the mating surfaces. This makes them an excellent addition when installing SOUL Competition Headers, Long Tube Street Headers, or servicing the factory exhaust manifolds.
The complete kit includes four copper gaskets: two header-to-cylinder-head gaskets and two header-to-exhaust gaskets.
Fits all 2013–2016 Porsche 981 Boxster and Cayman vehicles
Complete four-piece header gasket set
Includes (2) Header-to-Head copper gaskets
Replaces OEM header-to-head gasket part number 997 111 107 31
Includes (2) Header-to-Exhaust copper gaskets
Replaces OEM header-to-exhaust gasket part number 982 251 263
Approximately 1 mm thick copper construction
Copper material helps conform to minor imperfections in exhaust mating surfaces for improved sealing
Ideal for header installation, exhaust service, or replacement of old and worn factory gaskets
Compatible with SOUL Competition Headers and SOUL Long Tube Street Headers
Can also be used when servicing compatible factory exhaust components
Includes all four gaskets required for both sides of the vehicle
Copper gaskets should not be reused
SOUL confirms the four-piece contents, OEM gasket references, approximately 1 mm copper construction, 2013–2016 981 fitment, and specifies that the copper gaskets should not be reused.
Exhaust gaskets should be replaced whenever the sealing surfaces have been disturbed or when existing gaskets show signs of wear, damage, or leakage.
SOUL specifically states that these copper gaskets are single-use components and should not be reused after installation.
The SOUL Race Exhaust System is designed for Porsche 981 Cayman GT4 and Boxster Spyder owners who prioritize maximum sound, reduced weight, durability, and track-focused performance. Developed specifically for aggressive track use, the system replaces the factory rear exhaust with a purpose-built architecture engineered to withstand sustained high-temperature, high-RPM operation while delivering an extremely aggressive naturally aspirated flat-six exhaust note.
Full 2.5-inch over-axle piping provides a free-flowing exhaust path while maintaining clearance around the axles and sway-bar end links, including on heavily modified or lowered vehicles. Rather than relying on conventional exhaust hangers welded directly to the piping, SOUL developed a dedicated transmission-mounted support system designed to improve durability under demanding track conditions.
The forward exhaust piping attaches to a bespoke SOUL transmission mounting brace using heavy-duty Mikalor band clamps. Additional rubber vibration dampeners support the over-axle piping and help isolate movement and vibration throughout the exhaust assembly. SOUL's mounting solution alone removes more than 5 lbs compared with the factory mounting hardware.
The complete system is constructed from mandrel-bent .065-inch-wall, 2.5-inch-diameter T304L stainless steel tubing. Laser-cut and press-brake-formed brackets are TIG welded for strength, while all exhaust welds are back-purged to improve durability and longevity under extreme operating conditions.
This is an intentionally aggressive exhaust system. SOUL designed it primarily around track performance rather than sound attenuation and specifically describes it as very loud. Cabin drone will still be present despite the resonated design, particularly during sustained cruising. For owners looking for the rawest and most track-focused exhaust configuration for the 981 GT4 or Spyder, the Race Exhaust delivers maximum exhaust presence without the complexity of a valved system.
Fits 2015–2016 Porsche 981 Cayman GT4 and Boxster Spyder
Designed around the 3.8L naturally aspirated flat-six
Purpose-built for aggressive track use, reduced weight, durability, and maximum exhaust character
Full 2.5-inch over-axle piping
Over-axle pipe profiles are designed to maintain clearance around the axles and sway-bar end links, including on heavily modified or lowered vehicles
Bespoke SOUL mounting system saves more than 5 lbs compared with the factory exhaust mounts
Forward piping connects to a dedicated transmission mounting brace using heavy-duty Mikalor band clamps
Rubber vibration dampeners provide additional support to the over-axle piping and help reduce stress caused by movement and vibration
Constructed from mandrel-bent .065-inch-wall, 2.5-inch-diameter T304L stainless steel tubing
Brackets are laser cut, press-brake formed, and TIG welded for increased durability
Exhaust welds are back-purged for improved strength and longevity under demanding operating conditions
Designed primarily around track performance rather than sound attenuation
Extremely aggressive exhaust volume
Resonators help shape the exhaust note, but cabin drone will still be present
Compatible with factory Porsche headers and SOUL headers
SOUL cautions that dimensional differences with some third-party aftermarket headers may create over-axle pipe clearance issues
Each exhaust is rigorously quality-checked and fixture-tested prior to shipment to help ensure accurate fitment
New high-grade hardware for the header-to-exhaust connections included
Detailed installation instructions included
Includes SOUL Slash-Cut exhaust tips in Signature Satin
Alternate tip finishes are available by special request
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 SOUL Race Exhaust System was developed primarily for track use and performance rather than maximum sound attenuation.
SOUL describes the system as very loud and specifically notes that cabin drone will remain present even with the resonators. Pairing the Race Exhaust with aftermarket headers will further increase overall exhaust volume and intensity.
SOUL does not recommend using the Race Exhaust together with aftermarket headers for normal street driving. Owners looking for a more refined exhaust experience with the ability to reduce volume when desired should consider the SOUL Valved Exhaust System instead.
The SOUL Race Exhaust is designed to fit vehicles equipped with the factory Porsche headers or compatible SOUL headers.
Because over-axle pipe clearance is intentionally optimized for the GT4 / Spyder chassis, dimensional differences in some third-party aftermarket header systems may create clearance issues. Customers using non-SOUL aftermarket headers should confirm compatibility before ordering.
This DasMotoring listing includes SOUL Slash-Cut exhaust tips in Signature Satin.
To keep ordering simple, alternate tip finishes 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.
This Race Exhaust is specifically listed by SOUL for the 2015–2016 Porsche 981 Cayman GT4 and Boxster Spyder.
The 981 GT4 Clubsport is not included in SOUL's published fitment for this particular Race Exhaust System and should not be assumed compatible.
This product is not CARB certified and may not be legal for use on emissions-controlled vehicles. SOUL identifies the system as intended for off-road use only.
Customers are responsible for ensuring compliance with all applicable local, state, and federal regulations before installation or use.
The SOUL Performance Exhaust System is designed for Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport owners who want a consistently aggressive naturally aspirated flat-six exhaust note without the complexity of a valved system. Developed as a lighter, simpler alternative to SOUL's Valved Exhaust System, the Performance Exhaust delivers its full exhaust character at all times while using high-quality mufflers to control unwanted drone and rasp.
SOUL specifically developed the system to provide greater exhaust volume than the factory Porsche Sport Exhaust with its valves open while maintaining a refined, full-bodied tone. The mufflers are designed to minimize undesirable cabin resonance while allowing substantially more of the 3.8L flat-six sound to reach the driver.
The system uses 2.5-inch OD over-axle piping constructed from mandrel-bent T304L stainless steel. Reinforced muffler casings and durable sound-absorbing material are designed to withstand extended street and track use without deteriorating over time.
For owners pairing the exhaust with aftermarket headers, the Performance Exhaust provides an aggressive overall sound while retaining mufflers to help control excessive rasp and drone. Unlike the SOUL Valved Exhaust System, there are no selectable exhaust modes—the system delivers its more aggressive character whenever the engine is running.
Fits 2015–2016 Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport
Designed around the 3.8L naturally aspirated flat-six
Direct bolt-on replacement for the factory rear exhaust system
Fixed, non-valved exhaust design provides consistent exhaust sound at all times
Developed as a lighter and simpler alternative to SOUL's Valved Exhaust System
Produces greater exhaust volume than factory Porsche Sport Exhaust with the valves open
High-quality mufflers help minimize unwanted drone and rasp while producing a fuller, more robust exhaust tone
Well suited for use with factory headers, SOUL Long Tube Street Headers, or SOUL Competition Headers
Features 2.5-inch OD over-axle piping
Constructed from mandrel-bent T304L stainless steel tubing
Reinforced muffler casings provide additional durability for extended street and track use
Mufflers use high-quality sound-absorbing material designed to withstand demanding use without blowing out over time
Each system is rigorously quality-checked and fixture-tested prior to shipment to help ensure accurate fitment
Direct bolt-on installation with detailed installation instructions included
Includes SOUL Straight-Cut Single-Wall exhaust tips in Signature Satin
Alternate SOUL tip styles and finishes are available by special request
Titanium single-wall tips are available by special request and save nearly one pound compared with stainless steel tips
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
The SOUL Performance Exhaust is a fixed, non-valved exhaust system.
Vehicles originally equipped with Porsche Sport Exhaust can use the SOUL Performance Exhaust, but the factory exhaust-valve functionality is no longer used after installation. The system maintains its more aggressive exhaust character at all times rather than switching between quieter and louder exhaust modes.
For owners who want to retain selectable exhaust volume and factory-style valve functionality, the SOUL Valved Exhaust System is the more appropriate 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 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, non-valved configuration for drivers who want a consistently aggressive exhaust note, reduced complexity, and strong exhaust flow.
The SOUL Valved Exhaust System adds controllable exhaust valves, allowing the driver to substantially reduce exhaust volume when desired while retaining an aggressive 3.8L flat-six sound with the valves open.
For owners who want the car to sound aggressive at all times and do not need selectable exhaust modes, the Performance Exhaust provides the simpler solution. For frequent highway driving, early-morning use, or owners who want the ability to quiet the car on demand, the Valved Exhaust provides greater flexibility.
The SOUL Valved Exhaust System is designed for Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport owners who want to amplify the character of the 3.8L naturally aspirated flat-six without sacrificing street usability. The system combines a refined muffled exhaust path with a freer-flowing 2.5-inch path, allowing the driver to transition between comfortable cruising and a significantly more aggressive exhaust experience.
With the valves closed, exhaust gases are routed through SOUL's packed mufflers to produce a refined, sporty exhaust note while minimizing unwanted cabin drone. SOUL specifically developed the system to remain comfortable at highway speeds with the factory headers or high-flow catted headers, making it well suited for cars that see regular street use.
With the valves open, exhaust gases are allowed to flow through large 2.5-inch piping, substantially increasing volume and allowing the 3.8L flat-six to deliver a more aggressive, high-RPM exhaust note. Perforations within the exhaust path keep the mufflers acoustically connected to the system, helping create a fuller and more robust tone rather than simply increasing overall volume.
SOUL also engineered the system with owners of catless headers in mind. Although overall exhaust volume increases considerably when paired with a catless header system, minimizing objectionable drone remained a primary design goal.
Fits 2015–2016 Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport
Designed specifically around the 3.8L naturally aspirated flat-six
Direct bolt-on replacement for the factory rear exhaust system
Compatible with the factory Porsche exhaust valve controls
Dual-mode valved design provides distinct refined and aggressive exhaust settings
With the valves closed, exhaust gases are routed through SOUL mufflers designed to significantly reduce unwanted cabin drone
With the valves open, exhaust gases flow through large 2.5-inch piping for substantially increased exhaust volume and flat-six character
Features 2.5-inch OD over-axle piping
Mufflers remain acoustically connected to the exhaust path with the valves open, helping produce a fuller and more robust exhaust tone
Designed to work with factory headers, high-flow catted headers, or catless competition headers
Specifically developed to minimize unwanted drone, including on vehicles equipped with more aggressive header configurations
Constructed from mandrel-bent T304L stainless steel tubing
Mufflers feature reinforced casings designed for long-term durability
High-quality sound-absorbing material is designed to withstand extended street and track use
Each exhaust is fixture-tested prior to shipment to help ensure accurate fitment
Direct bolt-on installation with detailed installation instructions included
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
The SOUL Valved Exhaust System is compatible with the factory Porsche exhaust valve controls, allowing normal operation through the existing exhaust button.
For owners who want direct control over the exhaust valves independent of Porsche's factory valve strategy, SOUL valve-control solutions can also be used with the system. Depending on the controller configuration, valve operation can be controlled through dedicated remotes and 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.
SOUL also offers alternate stainless steel and titanium tip configurations by special request. Titanium single-wall tips save nearly one pound compared with stainless steel tips.
The SOUL Valved Exhaust System can be paired with the factory headers, SOUL Long Tube Street Headers, or SOUL Competition Headers.
With factory or high-flow catted headers, SOUL designed the valves-closed mode to provide a refined exhaust note with minimal highway drone.
Pairing the system with catless Competition Headers substantially increases overall exhaust volume and aggression. The valved design still provides the ability to reduce exhaust volume when desired, making this system particularly useful for owners who want an aggressive complete exhaust setup without permanently committing to maximum volume.
The SOUL Competition Headers are designed for Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport owners looking to extract maximum performance, response, and sound from the naturally aspirated 3.8L flat-six. By eliminating the factory catalytic converters and replacing the restrictive factory header assemblies with a purpose-built performance design, the Competition Headers create a substantially freer-flowing exhaust path while reducing weight and operating temperatures.
SOUL developed this application specifically around the airflow requirements of the 3.8L engine, using 2-inch primary runners and appropriately sized collectors to maximize exhaust flow throughout the rev range. Port-matched flanges, smooth-radius primary tubing, and performance-oriented collectors work together to improve the transition from the cylinder heads into the remainder of the exhaust system.
Third-party testing performed on a Dyno Dynamics dynamometer demonstrated significant gains when the headers were combined with ECU calibration. SOUL reports approximately 40 wheel horsepower gained with the Competition Headers and tune combined, with approximately 20 wheel horsepower gained from the Competition Headers after the ECU tune had already been applied. Actual results will vary depending on vehicle condition, fuel, calibration, environmental conditions, and supporting modifications.
Removing the factory catalytic converters also produces a significantly more aggressive exhaust note, allowing substantially more of the high-RPM flat-six character of the GT4 and Spyder to come through. For owners prioritizing maximum exhaust flow, performance, and sound, the Competition Headers are the most aggressive header configuration in the SOUL lineup.
Fits 2015–2016 Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport
Designed specifically around the 3.8L naturally aspirated flat-six
Completely catless replacement for the factory header and catalytic converter assemblies
Features 2-inch primary runners
Properly sized collectors are designed to maximize exhaust flow and performance throughout the rev range
Port-matched flanges provide a smooth transition from the cylinder head into the primary runners
Smooth-radius primary tubing helps minimize unnecessary exhaust restriction
Performance-oriented collectors optimize exhaust flow from the individual primary runners into the remainder of the exhaust system
Designed to improve power, throttle response, engine response, and naturally aspirated flat-six sound
Third-party Dyno Dynamics testing demonstrated approximately 40 whp gained with the Competition Headers and ECU tune combined
Testing demonstrated approximately 20 whp gained from the Competition Headers after the ECU tune had already been applied
Removing the factory catalytic converters reduces weight compared with the factory header assemblies
Catalyst removal also reduces a significant source of heat within the factory exhaust system
Constructed from T304L stainless steel
Direct bolt-on installation
Each header assembly is rigorously quality-checked in-house
Each set is fixture-tested prior to shipment to help ensure accurate fitment
Detailed installation instructions included
Optional O2 sensor spacers available
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
The SOUL Competition Headers remove the factory catalytic converters and may trigger a check engine light as a result.
Optional O2 sensor spacers are available and may reduce the likelihood of catalyst-efficiency fault codes; however, O2 spacers should not be considered a guaranteed method of preventing a check engine light.
SOUL recommends an appropriate custom ECU calibration to address catalyst-related fault codes on vehicles equipped with these headers. A performance calibration can also allow the engine to better take advantage of the substantially increased exhaust flow provided by the catless configuration.
Optional O2 sensor spacers can be added to the Competition Headers at the time of purchase.
The spacers reposition the downstream oxygen sensors farther from the direct exhaust stream and may reduce the likelihood of catalyst-efficiency fault codes on some vehicles. Results can vary depending on the vehicle and calibration, and DasMotoring does not guarantee that O2 spacers will prevent a check engine light.
The SOUL Competition Headers eliminate the catalytic converters entirely, providing the least restrictive exhaust path, greater exhaust volume, and the most aggressive configuration for the 3.8L engine.
The SOUL Long Tube Street Headers retain large-diameter, free-flowing catalytic converters while still providing substantially improved exhaust flow, response, and performance over the factory header assemblies.
For owners prioritizing maximum flow, sound, and performance—and who plan to appropriately address catalyst-related ECU faults—the Competition Headers provide the more aggressive configuration. For owners who want to retain catalytic converters and maintain a more street-oriented exhaust system, the Long Tube Street Headers provide the catted alternative.
The SOUL Competition Headers remove the factory catalytic converters and are not CARB certified. SOUL identifies this product as intended for off-road use only due to removal of the factory catalytic converters.
Customers are responsible for ensuring compliance with all applicable local, state, and federal regulations before installation or use.
The SOUL Long Tube Street Headers are designed specifically for the 3.8L naturally aspirated flat-six found in the Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport. By replacing the restrictive factory header assemblies with properly sized long-tube runners, performance-oriented collectors, and large-diameter free-flowing catalytic converters, the system improves exhaust flow, throttle response, power delivery, and flat-six exhaust character while retaining a catted configuration.
SOUL developed this application specifically around the airflow requirements of the 3.8L engine, using 2-inch primary runners and appropriately sized collectors to support strong performance throughout the rev range and during sustained high-RPM operation. The catalytic converters are also sized to provide the flow capacity and durability required for demanding street and track use.
Third-party testing performed on a Dyno Dynamics dynamometer demonstrated significant gains when the headers were combined with ECU calibration. SOUL reports approximately 30 wheel horsepower gained with the headers and tune together, with approximately 12 wheel horsepower attributed to the Street Headers after the tune had already been applied. Actual results will vary depending on vehicle condition, fuel, calibration, environmental conditions, and supporting modifications.
For owners who want improved exhaust flow, throttle response, and naturally aspirated flat-six sound without moving to a fully catless configuration, the SOUL Long Tube Street Headers provide a strong balance of performance and street usability.
Fits 2015–2016 Porsche 981 Cayman GT4, Boxster Spyder, and GT4 Clubsport
Designed specifically around the 3.8L naturally aspirated flat-six
Long-tube header architecture developed specifically for the 981 GT4 / Spyder / Clubsport platform
Features 2-inch primary runners
Properly sized collectors are designed to optimize exhaust flow and support sustained high-RPM operation
Large-diameter, free-flowing catalytic converters provide increased exhaust flow while retaining a catted configuration
Designed to increase power, throttle response, and naturally aspirated flat-six exhaust character
Designed by SOUL to provide additional performance without triggering a check engine light
Third-party Dyno Dynamics testing demonstrated approximately 30 whp gained with the headers and ECU calibration combined
Testing demonstrated approximately 12 whp gained from the Street Headers after the ECU tune had already been applied
Port-matched flanges provide a smooth transition from the cylinder head into the primary runners
Smooth-radius primary tubing helps reduce unnecessary exhaust restriction
Performance-oriented collectors optimize the transition from the individual primary runners into the remainder of the exhaust system
Constructed from T304L stainless steel
Each header assembly is rigorously quality-checked in-house
Direct bolt-on installation
Each set is fixture-tested prior to shipment to help ensure accurate fitment
Detailed installation instructions included
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
The SOUL Long Tube Street Headers are designed as a direct bolt-on upgrade and to provide increased exhaust flow and performance without triggering a check engine light.
Third-party Dyno Dynamics testing demonstrates that the 3.8L engine can benefit substantially when the increased exhaust flow is combined with an appropriate ECU calibration. Testing showed approximately 30 additional wheel horsepower with the headers and tune combined, while comparison testing indicated approximately 12 wheel horsepower of that improvement came from the Street Headers after the ECU tune had already been installed.
An ECU tune is not included with the headers, and actual power gains will vary depending on vehicle condition, fuel quality, calibration, environmental conditions, and additional modifications.
The SOUL Long Tube Street Headers retain large-diameter, free-flowing catalytic converters while significantly improving the exhaust path compared with the factory header assemblies.
This configuration is intended for owners who want increased flow, response, performance, and exhaust character while retaining catalytic converters rather than converting the vehicle to a fully catless exhaust configuration.
These headers retain catalytic converters; however, the product is not CARB certified and may not be legal for use on emissions-controlled vehicles. SOUL identifies this product as intended for off-road use only.
Customers are responsible for ensuring compliance with all applicable local, state, and federal regulations before installation or use.
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