The SOUL Valved Exhaust System is designed for Porsche 987.1 Boxster and Cayman owners who want a true change in character at the press of a button. With the valves closed, the system delivers a refined, sporty exhaust note with minimal cabin drone. Open the valves and the exhaust becomes substantially more aggressive, allowing much more of the naturally aspirated flat-six sound to come through.
SOUL developed the system around two distinct exhaust paths. With the valves closed, exhaust gases are routed through high-quality mufflers packed with durable sound-absorbing material. This helps keep the car comfortable during highway cruising and normal street driving, especially when paired with factory headers.
With the valves open, exhaust gases are allowed to exit through large 2.5-inch piping, substantially increasing volume and exhaust character. Perforations within the system keep the mufflers acoustically connected to the exhaust path, helping produce a fuller and more robust tone rather than simply making the car louder.
The SOUL Valved Exhaust also provides a meaningful reduction in weight. The complete system weighs approximately 30 lbs, compared with approximately 35 lbs for the factory exhaust components, saving approximately 5 lbs / 2.2 kg.
For owners looking for a more aggressive exhaust without giving up quiet cruising capability, the SOUL Valved Exhaust offers a strong balance of sound, control, weight reduction, and everyday usability.
Fits all 2005–2008 Porsche 987.1 Boxster and Cayman models
Direct bolt-on replacement for the factory rear exhaust system
Dual-mode valved design provides distinct refined and aggressive exhaust settings
With the valves closed, exhaust gases are routed through SOUL mufflers designed to minimize unwanted cabin drone
With the valves open, exhaust gases flow through large 2.5-inch piping for substantially increased volume and flat-six character
Features 2.5-inch OD over-axle piping
High-quality muffler packing material is designed to withstand extended street and track use without deteriorating over time
Mufflers feature fortified casings for increased durability
Reinforced exhaust brackets help prevent cracking and fatigue during extended street and track use
Weighs approximately 30 lbs / 13.6 kg
Factory exhaust components weigh approximately 35 lbs / 15.9 kg
Saves approximately 5 lbs / 2.2 kg compared with the factory exhaust system
Constructed from mandrel-bent T304L stainless steel tubing
Direct bolt-on installation
Each exhaust is fixture-tested prior to shipment to help ensure accurate fitment
New high-grade hardware for the header-to-exhaust flanges included
Detailed installation instructions included
SOUL valve controller kit included
Includes SOUL Straight-Cut Single-Wall exhaust tips in Signature Satin
Alternate tip styles and finishes are available by special request
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Fits 2005–2008 Porsche 987.1 Boxster, Boxster S, Cayman, and Cayman S models
Compatible with 2.7L, 3.2L, and 3.4L naturally aspirated flat-six engines
The SOUL Valved Exhaust includes a valve controller kit.
For vehicles without factory Porsche Sport Exhaust, the controller is required to operate the exhaust valves.
For vehicles equipped with factory PSE, the SOUL exhaust can retain factory exhaust-valve operation. The included controller can also be used to provide direct manual valve override rather than relying solely on Porsche's factory valve strategy.
This allows owners to retain quiet operation when desired while having immediate access to the more aggressive valves-open exhaust mode.
With the valves closed and factory headers installed, SOUL designed the system to provide a refined, sporty exhaust note with minimal highway drone.
Opening the valves substantially changes the character of the system, allowing exhaust gases to flow more freely through the large 2.5-inch path and producing a much more aggressive flat-six exhaust note.
The result is a genuine difference between the two modes rather than a subtle change in volume.
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 can save nearly one pound compared with stainless steel tips.
The SOUL Valved Exhaust provides selectable sound control, allowing the driver to substantially reduce exhaust volume when desired while still having access to an aggressive valves-open exhaust mode.
The SOUL Performance Exhaust uses a fixed, non-valved configuration and delivers its more aggressive exhaust character at all times.
For frequent street use, highway driving, early-morning starts, or owners who simply want greater control over exhaust volume, the Valved Exhaust provides the more flexible solution. For owners who prefer a simpler fixed exhaust configuration, the Performance Exhaust remains the more straightforward option.
The SOUL Performance Exhaust System is designed for Porsche 987.1 Boxster and Cayman owners who want substantially more naturally aspirated flat-six sound without sacrificing everyday drivability. The factory rear exhaust incorporates restrictive secondary catalytic converters, relatively small tubing, and heavy mufflers that suppress much of the character of the 987.1 engine.
SOUL replaces the factory rear exhaust with a freer-flowing system constructed from mandrel-bent T304L stainless steel and high-quality mufflers. The secondary catalytic converters are eliminated, reducing exhaust restriction and allowing substantially more of the flat-six exhaust note to come through under throttle.
Despite the increase in sound, SOUL specifically developed the system to remain refined during normal driving. The mufflers are designed to virtually eliminate objectionable drone during cruising and partial-throttle operation—even when the exhaust is paired with aftermarket catless headers. The result is a system that becomes aggressive when the engine is worked while remaining controlled around town and on the highway.
Weight reduction is another significant benefit. The complete SOUL system weighs approximately 21.7 lbs, compared with approximately 36.6 lbs for the factory rear exhaust components, reducing vehicle weight by approximately 15 lbs / 6.8 kg.
For owners looking for a simple, non-valved exhaust that emphasizes sound quality, reduced weight, and everyday usability, the SOUL Performance Exhaust offers an excellent balance between an aggressive flat-six experience and comfortable street manners.
Fits 2005–2008 Porsche 987.1 Boxster and Cayman models
Compatible with naturally aspirated 987.1 flat-six applications
Direct bolt-on replacement for the factory rear exhaust system
Eliminates the restrictive factory secondary catalytic converters
Retains the factory primary catalytic converters when used with stock headers
Freer-flowing exhaust design increases naturally aspirated flat-six sound and character
High-quality mufflers are designed to minimize unwanted cabin drone during cruising and partial-throttle operation
Remains refined during normal street driving while becoming substantially more aggressive under throttle
Designed to work well with factory headers or aftermarket headers
SOUL states that the system remains well controlled during partial-throttle operation even when paired with catless aftermarket headers
No exhaust valves required
Fixed exhaust configuration provides consistent exhaust character without the added complexity of a valved system
Weighs approximately 21.7 lbs / 9.8 kg
Factory rear exhaust components weigh approximately 36.6 lbs / 16.6 kg
Saves approximately 15 lbs / 6.8 kg compared with the factory exhaust components
Constructed from mandrel-bent T304L stainless steel tubing
Mufflers feature reinforced casings designed for long-term durability
Reinforced exhaust brackets help prevent the cracking and fatigue sometimes experienced with less robust aftermarket mounting solutions
Each system is rigorously quality-checked and fixture-tested prior to shipment to help ensure accurate fitment
New high-grade hardware for the header-to-exhaust flanges included
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
Fits 2005–2008 Porsche 987.1 Boxster, Boxster S, Cayman, and Cayman S models
Compatible with 2.7L, 3.2L, and 3.4L naturally aspirated flat-six engines
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 rear exhaust and its selectable valve functionality are replaced by the fixed SOUL system.
The SOUL Performance Exhaust is designed to provide its full exhaust character at all times while using its mufflers to control unwanted resonance and drone.
For customers who specifically want selectable quiet and aggressive exhaust modes, the SOUL Valved Exhaust System is the more appropriate configuration.
The factory 987.1 exhaust uses catalytic converters within the header assemblies as well as additional secondary catalytic converters farther downstream.
The SOUL Performance Exhaust removes the secondary catalytic converters contained within the factory rear exhaust while leaving the primary catalytic converters untouched when the vehicle retains its factory headers.
SOUL states that the Performance Exhaust is designed to operate without triggering a check engine light.
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 offers additional stainless steel and titanium tip configurations by special request. Titanium single-wall tips can reduce weight by nearly one pound compared with stainless steel tips.
This system removes the factory secondary catalytic converters and is not CARB certified. SOUL identifies the product as intended for off-road use only and notes that it may not be legal for use on emissions-controlled vehicles.
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 for Porsche 987.1 Boxster and Cayman owners looking to improve exhaust flow, throttle response, and naturally aspirated flat-six sound while retaining catalytic converters. Replacing the restrictive factory header assemblies with properly sized long-tube runners, performance-oriented collectors, and premium high-flow catalysts creates a substantially more efficient exhaust path without moving to a fully catless configuration.
SOUL developed the system specifically for the 987.1 platform using 1.75-inch primary runners. Runner and collector sizing was optimized around the 3.4L engine while still providing meaningful improvements for the 2.7L flat-six. High-quality merge spikes within the collectors help smooth exhaust flow as the individual primary runners come together, improving efficiency through one of the most restrictive areas of the factory exhaust system.
At the center of the Street Header design are HJS 200-cell high-flow catalytic converters. HJS catalysts are known for excellent exhaust flow and durability, using a premium double-foil construction engineered to withstand demanding operating conditions. SOUL states that these catalysts are efficient enough to meet stringent EURO 3 emissions requirements while providing substantially greater flow than the factory catalytic converters and greatly reducing the likelihood of a catalyst-related check engine light.
The result is a freer-breathing naturally aspirated engine with improved response and a deeper, more aggressive flat-six exhaust note while retaining catalytic converters for a more street-oriented configuration than SOUL Competition Headers.
Fits 2005–2008 Porsche 987.1 Boxster and Cayman models
Compatible with both 2.7L and 3.4L naturally aspirated flat-six engines
Long-tube header architecture developed specifically for the Porsche 987.1 platform
Features 1.75-inch primary runners
Runner and collector sizing optimized around the 3.4L engine while also providing performance improvements for the 2.7L
Incorporates HJS 200-cell high-flow catalytic converters
HJS catalysts utilize premium double-foil construction for increased strength and durability
Catalysts are designed to provide substantially increased exhaust flow while maintaining effective emissions conversion
HJS catalysts used in this application are capable of meeting EURO 3 emissions standards
Designed to greatly reduce the likelihood of a catalyst-efficiency check engine light compared with a catless header configuration
High-quality merge spikes are incorporated into the collectors to smooth exhaust flow and improve performance
Thick precision water-jet-cut flanges provide accurate fitment and long-term durability
Constructed from T304L stainless steel
Designed to improve exhaust flow, throttle response, power delivery, and naturally aspirated flat-six sound
Direct bolt-on replacement for the factory header assemblies
Each header set is built and tested in a dedicated thick-gauge fixture to minimize welding distortion and ensure accurate fitment
New high-grade hardware for the header-to-exhaust connections included
Detailed installation instructions included
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Fits 2005–2008 Porsche 987.1 Boxster, Boxster S, Cayman, and Cayman S models
Compatible with 2.7L, 3.2L, and 3.4L naturally aspirated flat-six engines
The SOUL Long Tube Street Headers use HJS 200-cell high-flow catalytic converters rather than eliminating the catalysts entirely.
The HJS design combines a low-restriction 200-cell substrate with premium double-foil construction for durability under demanding operating conditions. This allows the headers to substantially improve exhaust flow while retaining catalytic converters and maintaining a more street-oriented configuration.
SOUL states that the HJS catalysts used in these headers are efficient enough to meet EURO 3 emissions requirements while greatly reducing the likelihood of a catalyst-related check engine light.
The SOUL Long Tube Street Headers retain HJS 200-cell high-flow catalytic converters while improving runner geometry, collector design, exhaust flow, throttle response, and flat-six sound.
The SOUL Competition Headers eliminate the catalytic converters entirely for the least restrictive exhaust path and a substantially more aggressive exhaust configuration.
For owners who want improved performance and sound while retaining high-flow catalytic converters, the Long Tube Street Headers provide the more street-oriented solution. For vehicles built around a fully catless exhaust configuration, the Competition Headers provide the more aggressive alternative.
The HJS 200-cell catalytic converters used in these headers are specifically selected for their combination of high exhaust flow and emissions efficiency.
SOUL states that their efficiency greatly reduces the likelihood of a check engine light compared with a catless header configuration. Individual vehicle condition, emissions-system health, ECU calibration, and other modifications can affect catalyst monitoring, so DasMotoring does not guarantee that a check engine light can never occur.
Although these headers retain catalytic converters, customers are responsible for verifying compliance with all applicable local, state, and federal emissions regulations before installation or use.
Retention of catalytic converters does not necessarily mean an aftermarket exhaust component is approved for use on emissions-controlled vehicles in every jurisdiction.
The SOUL Competition Headers are designed for Porsche 987.1 Boxster and Cayman owners looking to improve exhaust flow, engine response, sound, and durability while removing the restrictive factory catalytic converter assemblies. By replacing the heavy factory manifolds with a purpose-built catless header design, the system creates a freer-flowing exhaust path and allows substantially more of the naturally aspirated flat-six character to come through.
SOUL developed these headers using port-matched flanges, smooth-radius primary tubing, and performance-oriented collectors designed to improve the transition from the cylinder heads into the remainder of the exhaust system. The result is reduced exhaust restriction, sharper engine response, lower weight, and a significantly more aggressive exhaust note.
The headers are fabricated from mandrel-bent 14–16 gauge T304L stainless steel tubing and are designed as a direct bolt-on replacement for the factory header assemblies. Each set is fixture-tested and quality-checked prior to shipment to help ensure accurate fitment.
The SOUL Competition Headers also have a unique motorsport history on the 987.1 platform. After repeated factory header and catalytic-converter failures in PCA Spec Cayman competition, SOUL developed its Competition Headers as a durable alternative. SOUL part number POR.9871.COH was approved as a class-legal replacement under the Spec Cayman rules.
Fits 2005–2008 Porsche 987.1 Boxster and Cayman models
Complete catless replacement for the factory header and catalytic converter assemblies
Designed to improve exhaust flow, engine response, and naturally aspirated flat-six sound
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 into the remainder of the exhaust system
Provides weight savings compared with the heavy factory header and catalytic converter assemblies
Removal of the factory catalytic converters reduces a significant source of heat within the exhaust system
Constructed from mandrel-bent 14–16 gauge T304L stainless steel tubing
Direct bolt-on installation
Each header set is fixture-tested prior to shipment to help ensure accurate fitment
Thorough installation instructions included
Optional O2 sensor spacers available
SOUL part number POR.9871.COH has been approved as a replacement header for PCA Spec Cayman competition
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Fits 2005–2008 Porsche 987.1 Boxster, Boxster S, Cayman, and Cayman S models
Compatible with 2.7L, 3.2L, and 3.4L naturally aspirated flat-six engines
The SOUL Competition Headers remove the factory catalytic converters and may trigger a check engine light as a result.
SOUL recommends an appropriate ECU calibration for vehicles using these headers to address catalyst-related fault codes. A performance calibration may also allow the engine to better take advantage of the increased exhaust flow provided by the catless configuration.
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.
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 ECU calibration, and DasMotoring does not guarantee that O2 spacers will prevent a check engine light.
SOUL originally developed these Competition Headers in response to repeated factory header and catalytic-converter failures experienced by competitors in the PCA Spec Cayman series.
The SOUL Competition Header, part number POR.9871.COH, was approved as a class-legal replacement for the factory exhaust manifolds under the Spec Cayman rules, providing racers with a more durable replacement backed by SOUL's Lifetime Warranty.
Competitors should always verify the current PCA Club Racing rulebook before competition, as class regulations can change over time.
The SOUL Competition Headers remove the factory catalytic converters and are not CARB certified. This product may not be legal for use on emissions-controlled vehicles and is 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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