BBi 991 GT3 StreetCup Exhaust Bypass
The first modification we did was upgrading the exhaust system to enhance the exhaust note and reduce weight behind the rear axle. Most other aftermarket exhaust systems on the market replaces the secondary center muffler and the performance gains and weight savings are minimal. The factory secondary exhaust weights approximately 20 pounds and the average secondary muffler bypass weighs approximately 7 pounds, which equates to only 13 pounds of weight savings.
Our Porsche 991 GT3 / GT3 RS Exhaust Bypass took a more unorthodox approach and bypassed the much heavier primary side mufflers. The primary mufflers are weigh approximately 44 pounds total while our bypass pipes are 4 pounds in comparison. For durability and protection against corrosion, each system is meticulously TIG welded using 304 aerospace grade stainless tubing with lower carbon content. The result is a substantial reduction in weight behind the rear axle which significantly improves handling and less restriction to produce a much more aggressive exhaust note.
Key Features - Delivers deep aggressive exhaust sound
- Significant weight reduction of 40 pounds
- 304 stainless steel aerospace tubing
- Meticulously TIG welded
- Brushed stainless finish
- Stainless hardware and clamps
- 100% emissions legal
- Will not void warranty
- Factory secondary mufflers and catalytic converters are all retained
- 50 state emission compliant
- Direct bolt on replacement
- Compatible with 991 GT3 and 991 GT3RS models
- Made in USA
Bumper Removed
Heat Shield Removed
OEM Side Mufflers Removed
OEM Side Mufflers vs BBi 991 GT3 StreetCup Exhaust bypass
40lb Weight Savings. 44lb vs 4lb
BBi 991 GT3 StreetCup Exhaust Bypass Installed
Bumper Reinstalled
