The SOUL Side Muffler Bypass Pipes are designed for Porsche 997 and 997.2 GT3 / GT3 RS owners looking for substantial weight reduction, reduced rear heat soak, increased exhaust flow, and a more aggressive naturally aspirated flat-six exhaust note.
Rather than replacing the factory center muffler, the system eliminates the heavy factory side mufflers and replaces them with lightweight 3-inch stainless steel bypass pipes. The factory side exhaust components weigh approximately 44.9 lbs, while the complete SOUL bypass assembly weighs just 6.6 lbs, removing approximately 38.3 lbs / 17.3 kg from the rear of the car.
Eliminating the side mufflers also reduces the amount of heat retained around the engine compartment and rear tires. SOUL incorporates high-quality flex bellows to accommodate thermal expansion and movement during aggressive driving, while an enlarged secondary-pipe opening helps equalize pressure within the factory center muffler.
The result is a dramatically lighter and freer-flowing exhaust configuration with significantly greater cabin presence, stronger high-RPM character, and the exotic race-inspired sound expected from a high-revving GT3.
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 flat-six engines, depending on model year
Retains the factory center muffler
Direct replacement for the factory side mufflers
Does not fit 997 Carrera, Turbo, or GT2 models
Completely removes the heavy factory side muffler assemblies
Retains the factory center muffler
Large 3-inch diameter primary piping increases exhaust flow
Weighs approximately 6.6 lbs / 3.0 kg
Factory side exhaust components weigh approximately 44.9 lbs / 20.4 kg
Saves approximately 38.3 lbs / 17.3 kg
Removes nearly 40 lbs from the rear of the vehicle
Reduced exhaust mass helps decrease heat soak within the engine compartment
Removing the factory side mufflers also helps reduce heat exposure around the rear tires
Enlarged secondary-pipe opening helps equalize pressure within the factory center muffler
Pressure equalization is designed to reduce stress on the center muffler
High-quality flex bellows allow movement as the exhaust heats, cools, and moves during aggressive driving
Flex sections simplify installation and help prevent cracking under extreme track conditions
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 exhaust is fixture-tested prior to shipment to ensure proper fitment
Foam-packed to protect the components during transportation
Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Weight savings are one of the biggest advantages of the SOUL Side Muffler Bypass Pipes.
Factory side exhaust components: approximately 44.9 lbs
SOUL Side Muffler Bypass Pipes: approximately 6.6 lbs
Total weight reduction: approximately 38.3 lbs / 17.3 kg
Removing more than 38 lbs from the rear of the vehicle provides a significant reduction in exhaust-system mass while also eliminating two large mufflers that act as heat sinks near the engine compartment.
For GT3s used heavily on track, reducing this retained heat can also help reduce the amount of radiant heat surrounding the rear tires and adjacent components.
The SOUL Side Muffler Bypass Pipes provide a substantial increase in exhaust volume without introducing undesirable changes in exhaust tone.
Expect:
Greater naturally aspirated flat-six presence throughout the rev range
More mechanical and race-derived exhaust character
Increased cabin presence between approximately 2,000–3,000 RPM
Significantly stronger GT3 exhaust character above 5,000 RPM
Greater overall volume than the factory side-muffler configuration
The high-RPM character is where this system is particularly rewarding, allowing substantially more of the GT3's naturally aspirated flat-six sound into the cabin as engine speed climbs.
SOUL incorporates high-quality flex bellows into the Side Muffler Bypass Pipes rather than using completely rigid tubing.
The flex sections allow controlled movement as the exhaust heats and expands, while also accommodating movement during aggressive street and track use.
This helps reduce stresses transferred through the exhaust system, simplifies installation and alignment, and reduces the likelihood of cracking during repeated thermal cycles or extreme racing conditions.
The opening leading into the secondary pipe is enlarged as part of SOUL's design.
This helps equalize pressure within the factory center muffler, reducing the pressure imbalance that can contribute to fatigue and cracking over time.
This allows the factory center muffler to remain part of the exhaust system while the much heavier side mufflers are completely eliminated.
The SOUL Side Muffler Bypass Pipes provide the greatest weight reduction of the two configurations, weighing approximately 6.6 lbs and saving approximately 38.3 lbs compared with the factory components.
The SOUL Valved Side Muffler Bypass Pipes incorporate exhaust valves that allow the driver to retain a quieter and louder operating mode. The additional valve hardware increases system weight to approximately 9.5 lbs, resulting in approximately 35.4 lbs of weight savings.
For owners prioritizing minimum weight, simplicity, and an always-aggressive exhaust configuration, the fixed Side Muffler Bypass Pipes provide the more focused solution.
For owners who want substantial weight savings while retaining exhaust-volume control, the Valved Side Muffler Bypass Pipes provide the more flexible alternative.
This product replaces only the side mufflers and does not replace the center exhaust outlet or exhaust tips.
The vehicle's existing center muffler and exhaust-tip configuration remain in place.
No exhaust-tip selection is required for this product.
SOUL states that this product is not CARB certified and may not be legal for use on emissions-controlled vehicles.
It is intended for off-road use only where required by applicable regulations.
Customers are responsible for ensuring compliance with all applicable local, state, and federal requirements before installation or use.
The SOUL Side Muffler Bypass Pipes are designed for Porsche 997 and 997.2 GT3 / GT3 RS owners looking for substantial weight reduction, reduced rear heat soak, increased exhaust flow, and a more aggressive naturally aspirated flat-six exhaust note.
Rather than replacing the factory center muffler, the system eliminates the heavy factory side mufflers and replaces them with lightweight 3-inch stainless steel bypass pipes. The factory side exhaust components weigh approximately 44.9 lbs, while the complete SOUL bypass assembly weighs just 6.6 lbs, removing approximately 38.3 lbs / 17.3 kg from the rear of the car.
Eliminating the side mufflers also reduces the amount of heat retained around the engine compartment and rear tires. SOUL incorporates high-quality flex bellows to accommodate thermal expansion and movement during aggressive driving, while an enlarged secondary-pipe opening helps equalize pressure within the factory center muffler.
The result is a dramatically lighter and freer-flowing exhaust configuration with significantly greater cabin presence, stronger high-RPM character, and the exotic race-inspired sound expected from a high-revving GT3.
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 flat-six engines, depending on model year
Retains the factory center muffler
Direct replacement for the factory side mufflers
Does not fit 997 Carrera, Turbo, or GT2 models
Completely removes the heavy factory side muffler assemblies
Retains the factory center muffler
Large 3-inch diameter primary piping increases exhaust flow
Weighs approximately 6.6 lbs / 3.0 kg
Factory side exhaust components weigh approximately 44.9 lbs / 20.4 kg
Saves approximately 38.3 lbs / 17.3 kg
Removes nearly 40 lbs from the rear of the vehicle
Reduced exhaust mass helps decrease heat soak within the engine compartment
Removing the factory side mufflers also helps reduce heat exposure around the rear tires
Enlarged secondary-pipe opening helps equalize pressure within the factory center muffler
Pressure equalization is designed to reduce stress on the center muffler
High-quality flex bellows allow movement as the exhaust heats, cools, and moves during aggressive driving
Flex sections simplify installation and help prevent cracking under extreme track conditions
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 exhaust is fixture-tested prior to shipment to ensure proper fitment
Foam-packed to protect the components during transportation
Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Weight savings are one of the biggest advantages of the SOUL Side Muffler Bypass Pipes.
Factory side exhaust components: approximately 44.9 lbs
SOUL Side Muffler Bypass Pipes: approximately 6.6 lbs
Total weight reduction: approximately 38.3 lbs / 17.3 kg
Removing more than 38 lbs from the rear of the vehicle provides a significant reduction in exhaust-system mass while also eliminating two large mufflers that act as heat sinks near the engine compartment.
For GT3s used heavily on track, reducing this retained heat can also help reduce the amount of radiant heat surrounding the rear tires and adjacent components.
The SOUL Side Muffler Bypass Pipes provide a substantial increase in exhaust volume without introducing undesirable changes in exhaust tone.
Expect:
Greater naturally aspirated flat-six presence throughout the rev range
More mechanical and race-derived exhaust character
Increased cabin presence between approximately 2,000–3,000 RPM
Significantly stronger GT3 exhaust character above 5,000 RPM
Greater overall volume than the factory side-muffler configuration
The high-RPM character is where this system is particularly rewarding, allowing substantially more of the GT3's naturally aspirated flat-six sound into the cabin as engine speed climbs.
SOUL incorporates high-quality flex bellows into the Side Muffler Bypass Pipes rather than using completely rigid tubing.
The flex sections allow controlled movement as the exhaust heats and expands, while also accommodating movement during aggressive street and track use.
This helps reduce stresses transferred through the exhaust system, simplifies installation and alignment, and reduces the likelihood of cracking during repeated thermal cycles or extreme racing conditions.
The opening leading into the secondary pipe is enlarged as part of SOUL's design.
This helps equalize pressure within the factory center muffler, reducing the pressure imbalance that can contribute to fatigue and cracking over time.
This allows the factory center muffler to remain part of the exhaust system while the much heavier side mufflers are completely eliminated.
The SOUL Side Muffler Bypass Pipes provide the greatest weight reduction of the two configurations, weighing approximately 6.6 lbs and saving approximately 38.3 lbs compared with the factory components.
The SOUL Valved Side Muffler Bypass Pipes incorporate exhaust valves that allow the driver to retain a quieter and louder operating mode. The additional valve hardware increases system weight to approximately 9.5 lbs, resulting in approximately 35.4 lbs of weight savings.
For owners prioritizing minimum weight, simplicity, and an always-aggressive exhaust configuration, the fixed Side Muffler Bypass Pipes provide the more focused solution.
For owners who want substantial weight savings while retaining exhaust-volume control, the Valved Side Muffler Bypass Pipes provide the more flexible alternative.
This product replaces only the side mufflers and does not replace the center exhaust outlet or exhaust tips.
The vehicle's existing center muffler and exhaust-tip configuration remain in place.
No exhaust-tip selection is required for this product.
SOUL states that this product is not CARB certified and may not be legal for use on emissions-controlled vehicles.
It is intended for off-road use only where required by applicable regulations.
Customers are responsible for ensuring compliance with all applicable local, state, and federal requirements before installation or use.
