Our Porsche 991 turbo exhaust is a masterpiece of engineering, we are truly proud to be able to offer it to all of you lucky 991 owners. These Porsche flat-six’s are already amazing, with variable geometry turbos along with many other great features from the factory. It is a true performance racing engine, however the factory exhaust is very restrictive, killing all chances of true performance, and muting the sound of this engine to simply undesirable levels. This is an Twin turbo Porsche, and it should sound like it. Bullet performance’s 991 exhaust system offers an extremely high flowing design in comparison by removing the primary and secondary catalytic converters, while optimizing flow in all other areas, retaining a true 3 inch design throughout, unlike many of our competitors who use 2.5 or 2.75 inch tubing. The real secret of this system is our signature crossover “xpipe” with its incorporated swirling vortex chamber. It works so efficiently and sounds so good we were surprised ourselves during our prototyping stages! Power is completely maximized, and many of our customers argue it is hands down, the best sounding system available for this car. Our competitors simply do not think about flow the way we do; they often have very short and rough transitions, as well as lips and rough edges completely destroying any chance of high flow. With our exhaust all hangers and 02 sensors go to their factory locations, so you can guarantee this piece will fit like a stock replacement. With this system you will truly be able to feel the power gains. Turbo response is greatly improved as well as driveability, but you will be most impressed by the sound; you can really hear the amazing exotic sound of the engine, the same sound that Porsche should have offered in the first place.
More Sound. More Power. No Drone.Are you looking for more sound out of your 997/991 GT3 without sacrificing street drivability? Look no further than the TPC Racing Active Side Muffler Bypass pipe. It provides cup car sound and performance when you want it, while eliminating unwanted cabin drone and excessive noise in normal street conditions. All this while improving performance and handling.
How it worksUsing a factory-style actuator-controlled valve, the TPC Racing Active Side Muffler Bypass System provides cup car sound and performance in higher rpm/higher load ranges, while eliminating unwanted cabin drone and excessive noise. Its lightweight design saves 40 lbs from the OEM side mufflers, resulting in improved handling. Better exhaust flow management allows for increased torque between 2,600 and 5,600 rpm, as well as increased horsepower between 5-8,250 rpm.
Features• 40 lb. Weight Reduction from OEM • Factory-Style Actuator-Controlled valve • Metal Flex Joint for Easy Installation/Proper Fitment • Metal Flex Joint Reduces Chance of Center Muffler Fatigue • Machined/Fabricated In-House • Each Unit is Handmade in the USA • Stainless Steel Construction with Brush Finish
- Porsche 987 Boxster Mk1 Valved Exhaust System
- 200 Cell High Flow Catalytic Converters
- High Flow Headers
- Programmable Remote Control (CES-3)
- Polished Tips
- Porsche 997 Turbo/Turbo S Facelift Valved Exhaust System
- Cat Delete Test Pipes
- Ceramic Coated Exhaust Tips
- CES-3 Programmable Remote