The SOUL Valved Side Muffler Bypass Pipes are designed for Porsche 997 and 997.2 GT3 / GT3 RS owners looking for a major reduction in rear-mounted weight and heat while retaining factory-style exhaust valve functionality.
Rather than replacing the center muffler, this system eliminates the large factory side mufflers and replaces them with lightweight 3-inch valved bypass pipes. Removing the side mufflers saves approximately 35.4 lbs / 16 kg from the rear of the car while also reducing the amount of heat retained around the engine compartment and rear tires.
SOUL incorporates high-quality exhaust valves that operate like the factory system. With the valves closed, exhaust is still routed through the factory center muffler, providing a moderately louder but comfortable exhaust note. Opening the valves allows the GT3's naturally aspirated flat-six to breathe through the freer-flowing bypass pipes, producing a significantly more aggressive and exotic exhaust character.
Compared with a center muffler bypass, SOUL specifically designed the Valved Side Muffler Bypass Pipes to provide a smoother transition between the quieter and louder valve positions while delivering substantially greater weight savings.
Fits 2006–2011 Porsche 997 / 997.2 GT3
Fits 2006–2011 Porsche 997 / 997.2 GT3 RS
Compatible with both 997.1 and 997.2 GT3 generations
Compatible with the naturally aspirated 3.6L and 3.8L GT3 engines, depending on model year
Retains exhaust-valve functionality
Retains the factory center muffler
Does not fit 997 Carrera, Turbo, or GT2 models
SOUL specifies this system for all 2006–2011 Porsche 997 and 997.2 GT3 / GT3 RS vehicles.
Replaces the heavy factory side mufflers
Retains the factory center muffler
Integrated high-quality exhaust valves operate in a factory-style manner
Large 3-inch diameter primary piping
Weighs approximately 9.5 lbs / 4.3 kg
Factory components weigh approximately 44.9 lbs / 20.4 kg
Saves approximately 35.4 lbs / 16 kg
Removing the large side mufflers helps reduce heat retained in the rear of the vehicle
Reduced rear exhaust mass can also help reduce heat exposure around the rear tires
Enlarged secondary-pipe opening helps equalize pressure within the factory center muffler
Pressure equalization is intended to promote center-muffler longevity
Flexible bellows simplify installation while allowing movement during thermal expansion and demanding track use
Constructed from mandrel-bent 3-inch T304L stainless steel tubing
Uses durable .065-inch-wall tubing
Direct bolt-on installation
No cutting or permanent vehicle modification required
Each assembly is fixture-tested prior to shipment to ensure proper fitment
Foam-packed for protection during shipping
Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Exhaust valves and the remainder of the assembly are covered by SOUL's Lifetime Warranty for both street and track use
One of the biggest advantages of the Valved Side Muffler Bypass system is weight reduction.
The factory side exhaust components weigh approximately 44.9 lbs, while the complete SOUL assembly weighs approximately 9.5 lbs.
That represents a reduction of approximately:
35.4 lbs / 16 kg
Because the factory side mufflers are substantial heat sinks located at the rear of the vehicle, removing them also reduces heat accumulation around the engine compartment and rear tires.
The SOUL Side Muffler Bypass Pipes incorporate exhaust valves that preserve the GT3's ability to switch between quieter and louder exhaust configurations.
Valves Closed:
Exhaust continues through the factory center muffler, producing a moderately increased exhaust note while retaining a comfortable character for normal street driving.
Valves Open:
The bypass pipes provide a much freer exhaust path, revealing a significantly more aggressive and exotic flat-six tone.
SOUL specifically notes that the transition between open and closed operation is smoother than with a Center Muffler Bypass configuration.
With the valves closed, overall volume is increased moderately while the factory center muffler continues to provide substantial sound attenuation.
Opening the valves transforms the system, exposing much more of the GT3's naturally aspirated exhaust character and producing a refined, exotic tone appropriate for the high-revving Mezger engine.
The final sound level will depend significantly on the header configuration. Pairing the Valved Side Muffler Bypass Pipes with factory headers provides a more restrained setup, while combining them with SOUL Street or Competition Headers creates a much more aggressive complete exhaust system.
SOUL incorporates flex bellows into the bypass pipes rather than using completely rigid tubing.
These allow controlled movement as the exhaust heats, cools, and moves under demanding driving conditions. This reduces stress transmitted between exhaust components while also making installation and alignment easier.
SOUL specifically notes that the design provides additional durability under extreme racing conditions in a manner similar to the factory system.
SOUL can add oxygen-sensor bungs to the Side Muffler Bypass Pipes for vehicles using aftermarket headers that relocate the O2 sensors to this portion of the exhaust.
O2 bungs are not installed by default in order to minimize unnecessary weight.
If your vehicle requires O2 bungs due to an aftermarket header configuration, contact DasMotoring before ordering so the appropriate configuration can be confirmed.
The SOUL Valved Side Muffler Bypass Pipes are designed for Porsche 997 and 997.2 GT3 / GT3 RS owners looking for a major reduction in rear-mounted weight and heat while retaining factory-style exhaust valve functionality.
Rather than replacing the center muffler, this system eliminates the large factory side mufflers and replaces them with lightweight 3-inch valved bypass pipes. Removing the side mufflers saves approximately 35.4 lbs / 16 kg from the rear of the car while also reducing the amount of heat retained around the engine compartment and rear tires.
SOUL incorporates high-quality exhaust valves that operate like the factory system. With the valves closed, exhaust is still routed through the factory center muffler, providing a moderately louder but comfortable exhaust note. Opening the valves allows the GT3's naturally aspirated flat-six to breathe through the freer-flowing bypass pipes, producing a significantly more aggressive and exotic exhaust character.
Compared with a center muffler bypass, SOUL specifically designed the Valved Side Muffler Bypass Pipes to provide a smoother transition between the quieter and louder valve positions while delivering substantially greater weight savings.
Fits 2006–2011 Porsche 997 / 997.2 GT3
Fits 2006–2011 Porsche 997 / 997.2 GT3 RS
Compatible with both 997.1 and 997.2 GT3 generations
Compatible with the naturally aspirated 3.6L and 3.8L GT3 engines, depending on model year
Retains exhaust-valve functionality
Retains the factory center muffler
Does not fit 997 Carrera, Turbo, or GT2 models
SOUL specifies this system for all 2006–2011 Porsche 997 and 997.2 GT3 / GT3 RS vehicles.
Replaces the heavy factory side mufflers
Retains the factory center muffler
Integrated high-quality exhaust valves operate in a factory-style manner
Large 3-inch diameter primary piping
Weighs approximately 9.5 lbs / 4.3 kg
Factory components weigh approximately 44.9 lbs / 20.4 kg
Saves approximately 35.4 lbs / 16 kg
Removing the large side mufflers helps reduce heat retained in the rear of the vehicle
Reduced rear exhaust mass can also help reduce heat exposure around the rear tires
Enlarged secondary-pipe opening helps equalize pressure within the factory center muffler
Pressure equalization is intended to promote center-muffler longevity
Flexible bellows simplify installation while allowing movement during thermal expansion and demanding track use
Constructed from mandrel-bent 3-inch T304L stainless steel tubing
Uses durable .065-inch-wall tubing
Direct bolt-on installation
No cutting or permanent vehicle modification required
Each assembly is fixture-tested prior to shipment to ensure proper fitment
Foam-packed for protection during shipping
Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Exhaust valves and the remainder of the assembly are covered by SOUL's Lifetime Warranty for both street and track use
One of the biggest advantages of the Valved Side Muffler Bypass system is weight reduction.
The factory side exhaust components weigh approximately 44.9 lbs, while the complete SOUL assembly weighs approximately 9.5 lbs.
That represents a reduction of approximately:
35.4 lbs / 16 kg
Because the factory side mufflers are substantial heat sinks located at the rear of the vehicle, removing them also reduces heat accumulation around the engine compartment and rear tires.
The SOUL Side Muffler Bypass Pipes incorporate exhaust valves that preserve the GT3's ability to switch between quieter and louder exhaust configurations.
Valves Closed:
Exhaust continues through the factory center muffler, producing a moderately increased exhaust note while retaining a comfortable character for normal street driving.
Valves Open:
The bypass pipes provide a much freer exhaust path, revealing a significantly more aggressive and exotic flat-six tone.
SOUL specifically notes that the transition between open and closed operation is smoother than with a Center Muffler Bypass configuration.
With the valves closed, overall volume is increased moderately while the factory center muffler continues to provide substantial sound attenuation.
Opening the valves transforms the system, exposing much more of the GT3's naturally aspirated exhaust character and producing a refined, exotic tone appropriate for the high-revving Mezger engine.
The final sound level will depend significantly on the header configuration. Pairing the Valved Side Muffler Bypass Pipes with factory headers provides a more restrained setup, while combining them with SOUL Street or Competition Headers creates a much more aggressive complete exhaust system.
SOUL incorporates flex bellows into the bypass pipes rather than using completely rigid tubing.
These allow controlled movement as the exhaust heats, cools, and moves under demanding driving conditions. This reduces stress transmitted between exhaust components while also making installation and alignment easier.
SOUL specifically notes that the design provides additional durability under extreme racing conditions in a manner similar to the factory system.
SOUL can add oxygen-sensor bungs to the Side Muffler Bypass Pipes for vehicles using aftermarket headers that relocate the O2 sensors to this portion of the exhaust.
O2 bungs are not installed by default in order to minimize unnecessary weight.
If your vehicle requires O2 bungs due to an aftermarket header configuration, contact DasMotoring before ordering so the appropriate configuration can be confirmed.
