K&N Universal 4 Inch Filter ['Car Covers' Performance Radius Cuts (PRC) are

Performance Radius Cuts (PRC) are an advanced machining technique used to improve the flow of fuel through the FASS System by creating smooth flowing cuts within the aluminum housing

There's a reason AWE is the #1 S5 exhaust on the planet

Fits 2006-2012

Every MaxFlow 5(TM)

Extension Pipe/Muffler/Over Axle Pipe/Tailpipe/Hardware/4 in

K&N Universal 4 Inch Filter ['Car Covers' Performance Radius Cuts (PRC) areK&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra strong molded pliable rubber flanges which absorb vibration and allow for secure