SOUL Performance Valved Side-Muffler Bypass Pipes for 997 Porsche 911 GT3 / GT3 RS

SOUL Performance Products’ Valved Side Muffler Bypass Pipes for the Porsche 997 and 997.2 GT3 / GT3 RS shed over 35 lb of rear-end weight and significantly reduce heat soak by replacing the bulky factory side mufflers with free-flowing 3″ T304L stainless piping, all while retaining full valve functionality. Large-diameter mandrel-bent primaries and an enlarged crossover opening improve exhaust flow and help equalize pressure in the center muffler, promoting longevity under hard use. High-quality valves and flex bellows are engineered to operate like OEM, allowing smooth transitions between closed and open modes, mildly louder and more present with valves shut, and a refined, exotic GT3 scream when opened. Each system is designed and built in-house at SOUL’s Willow Grove, PA facility from 3″ .065″-wall T304L stainless, fixture-tested for precise, direct bolt-on fitment, foam packed for safe delivery, and backed by SOUL’s Lifetime Warranty for both street and track use, making it an ideal solution for drivers who want real weight savings, better thermal management, and a more exciting soundtrack without sacrificing factory-like control.

Development & Testing

• By eliminating the side mufflers, significant weight reduction is achieved, aiding in efficient heat management within the engine bay and maintaining lower temperatures for the rear tires. The opening leading to the secondary pipe is enlarged to ensure equalized pressure in the center muffler, contributing to its longevity. Flex bellows allow for convenient installation and enhance durability, particularly in intense racing scenarios, similar to the original equipment manufacturer components. Additionally, large 3″ diameter primary piping enhances flow, while the valves function with the same high quality as the factory ones.

Construction

• Maximum durability is ensured in each set through the utilization of mandrel-bent T304L stainless steel tubing, with a wall thickness of 0.065 inches, and the inclusion of high-quality flex bellows.

Sound

• The sound exhibits a smoother transition between open and closed states than a center muffler bypass. When the valves are closed, the tone experiences a moderate increase while maintaining a comfortable sound level when the factory center muffler is installed. Opening the valves uncovers a sophisticated, exotic pitch that perfectly complements the powerful GT3 engine high-performance nature.

Bolt On & Go

• After undergoing meticulous testing in a fixture to guarantee an impeccable fit, each exhaust system is carefully packaged in foam to ensure its pristine condition upon arrival. It arrives ready for installation without the need for any cutting or modification.

Features

• Lightweight 3″ .065″ T304L stainless valved side bypass pipes
• Retains full OEM-style valve functionality for quiet and loud modes
• Over 35 lb rear-end weight reduction and improved heat management
• Enlarged crossover and 3″ primaries for smoother, higher exhaust flow
• Direct bolt-on, fixture-tested fitment built in-house by SOUL
• Backed by SOUL Performance Products’ Lifetime Warranty

Applications

• Porsche 911 GT3: 997.1, 997.2 (2006-2012)
  [3.6L F6] [3.8L F6]
  
• Porsche 911 GT3 RS: 997.1, 997.2 (2007-2012)
  [3.6L F6] [3.8L F6]
  

Notes

• Upon special request, O2 bungs can be added to accommodate aftermarket headers that relocate the bungs to the SMB. Throughout the entire process, the dedicated Bulletproof Team will act as your concierge, guiding you to achieve the ideal setup tailored specifically for your GT3 / GT3 RS.

About SOUL Performance

SOUL Performance Products was founded by a group of automotive enthusiasts with deep industry experience and a commitment to doing right by their customers. Their mission is to deliver outstanding performance parts at fair pricing, backed by quality service and one of the best warranties in the industry. SOUL develops high-performance exhaust systems and components that are engineered for exceptional sound and proven performance, with products ready to ship quickly worldwide. Guided by core values of honesty, transparency, and passion for cars, they build strong community connections and prioritize customer satisfaction at every step. Operating out of a dedicated facility in Willow Grove, Pennsylvania, SOUL combines hands-on research, engineering, and manufacturing expertise to create parts that meet and exceed the demands of serious enthusiasts.