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 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.
