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 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.
