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 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.
