The Active AutoWerke Signature Exhaust System for the E9X M3 is a complete stainless steel exhaust system for the E90 M3, E92 M3 and E93 M3 that will improve the performance, sound, and look of your factory M3. This system is the newest Active Autowerke exhaust to join their Signature line, constructed of 100% 304 polished stainless steel and features the Active Autowerke adjustable tips. In addition, this E90/E92/93 M3 exhaust system now features an Active noise cancelling chamber (NCC) eliminating drone and creating a more pleasant driving experience. This is a straight through system providing substantial flow improvements over the factory exhaust. Non obtrusive with a rich mellow sound, and delivers a juicy 15 + new hp with key gains in the mid-range. This is a complete bolt on system, a new must for the M3 enthusiast.Active AutoWerke Signature Exhaust System for the E9X M3 Key Features: