Active Autowerke Signature Exhaust BMW M3 E90/E92 S65

True performance, durability, and attractive weight advantages with innovative features places the Active Autowerke exhaust in a class of its own. This system is constructed from 100% 304-stainless steel and features adjustable Active Autowerke double walled tips, making it ideal both for 2-door and 4-door models (also allows for cleaner fitment with diffusers). This system uses factory style flanges making it a complete bolt on system that requires no cutting or welding. The system is a straight-through design providing substantial improvements to gas flow over the factory exhaust. The sound is unobtrusive, with a rich mellow tone and delivers a solid 5+hp, with key gains in the mid-range. In addition, the Active Autowerke Signature Exhaust system features large 3" piping for maximum exhaust flow while maintaining enough back-pressure to result in horsepower increases across the entire RPM range. The factory muffler features a Noise Canceling Chamber inside the muffler and Active Autowerke has retained this feature by adding two custom Active Autowerke noise canceling chambers (NCC)on each muffler to reduce/minimize the drone (the 'booming' noise some muffler emit at cruising speeds, ~3500 rpm). The M3 Signature Exhaust System provides increase in horsepower, great sound and appearance making it a must for the true M3 enthusiasts.Features: Large 3-inch mandrel bent piping for maximum flow  Durable, 100% 304 brushed stainless steel  Double-walled 76mm Signature stainless tips Revolutionary NCC -Noise Cancelling Chamber  Adjustable Tips with Embossed Active Autowerke Logo Improved power & torque throughout entire RPM band  Gains of 5+ HP over stock configuration BMW factory style hardware makes a truly easy installation with no need for cutting or re-welding  Weighs 40 Lbs vs. the factory of 55.1 Lbs. Complete illustrated instruction manual Two year warranty Fitment: 08-13 BMW M3 E90 and E92 Does not fit Convertible. For Convertible Click Here