Fabspeed Side Muffler Bypass Pipes for 991.2 Porsche 911 GT3 & GT3 RS

Fabspeed Side Muffler Bypass Pipes for 991.2 Porsche 911 GT3 & GT3 RS

The optimized design of Fabspeed’s side muffler bypass pipes offers a compelling replacement for the factory GT3 side mufflers, resulting in enhanced exhaust flow, a more dynamic sports car sound, and substantial weight reduction. These pipes feature top-tier Helical U.K. Great Britain Imported Aerospace-grade valves and incorporate O2 bungs, delivering the ultimate solution for both street and track performance in the 991.2 GT3 / GT3 RS. Importantly, the factory Sport Button PSE functionality remains fully retained when using Fabspeed GT3 side muffler bypass pipes with exhaust valves.

Helical Valves

• Helical valves were chosen for their exceptional quality, with Porsche Motorsports AG employing them in their GT3 side mufflers, a choice mirrored by Fabspeed. These valves come with a strong track record, trusted by several OEM manufacturers including McLaren, Ferrari, Lamborghini, Pagani, and more. Within Fabspeed’s side muffler bypass pipes, these Helical valves play a vital role demonstrating precise control over gas flow by opening and closing to optimize engine back-pressure, thereby enhancing overall performance. Drawing from extensive experience in high-volume OEM automotive applications, these valves incorporate key features such as a remarkably durable pneumatic actuator, precision flat sealing faces inside the valve, reinforcing ribs, and ultra-high-temperature bearings at both ends of the butterfly spindle. Helical, an aerospace company with expertise in exhaust components, embodies quality and reliability in their products.

02 Bungs 

• Fabspeed relocated of the O2 bungs from the header collector to the side muffler bypass pipes. This strategic adjustment preserves factory-like functionality while ensuring optimal performance of the collector. This design not only serves as a replacement for the existing SMBPs but also offers the flexibility to upgrade to the Long Tube Race Header design in the future. Furthermore, the inclusion of extra oxygen sensor ports enables data acquisition whenever needed, showcasing yet another value-added feature unique to Fabspeed.

Features

• Replicates aggressive CUP car sound for the street
• Increased power +9hp versus stock OEM restrictive dual side mufflers
• 14-16ga T304 stainless steel construction
• High quality OEM Porsche Ag. Helical limited exhaust valves
• Saves  a massive 41lbs  from the rear of the vehicle
• Retains sport button PSE functionality (Porsche sport exhaust)
• Simple bolt-on installation- remove rear left and right side mufflers and install
• Cat Back emissions legal – bolts onto OEM Porsche catalyst
• Includes O2 bungs and plugs at no extra charge
• All Fabspeed performance products are backed by the Fabspeed lifetime warranty

Applications

• 2017-2019 Porsche 911 GT3: 991.2  |  4.0L F6
• 2018-2019 Porsche 911 GT3 RS: 991.2  |  4.0L F6

Notes

• All Fabspeed products are expected to ship within one week of order, though timelines are often much quicker
• To retain PSE functionality please select the valved option upon checkout
• Installation instructions for Porsche homelink connection

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.