This ensures by far the most exhaust stream, reliability, and sound. Our Activity Cat Downpipe will stream 93% of the three'' straight pipe, all when providing emissions compliant general performance and NO Test engine light-weight. There is no have to run cat bypass pipes! Achieve torque, horsepower, and amplified throttle https://louiscipua.wikicorrespondent.com/5454455/fascination_about_m3_g80_downpipe