Product Description Our E9x M3 exhaust is a great addition to the M3. Improving the sound and performance of the M3 while retaining a very refined tone was our top priority when developing this system. Our full exhaust system is designed to bolt up directy to the vehicle. Power increase of up to 20 HP over stock and a weight reduction of 18 lbs. Our exhaust system incorporates two high flow catalytic converters and two resonators in the HFC version. Our catless system incorporates 4 high performance resonators. When paired with our performance NA software our HFC exhaust system will not trigger increased emissions errors and allows all OBD monitors to set properly.
