These fabspeed catbypass pipes save 25 lbs from the rear end of the car. Perfect for street/race, exploits maximum power. Improved throttle response and more aggressive sports car sound. Used by many rolex grand am cup racing teams and pca/poc/de racers. Easy bolt-on/bolt-off installation; hardware included. Will not work with factory mufflers or any other aftermarket 997tt exhaust system.

Note: for off-road use only! Cel may come on but car will run great. Optional 02 spacers available to keep c.e.l. Off.