Pipe Diameter: 2.75 into muffler dual 2.0" out
Tip Size: 3.14", Dual Round Rolled Angle-Cut long
Borla Cat-back TM & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.
2008-2011 E90 M3 Sedan 4.0L Automatic/Manual RWD 4 Door.