aFe MACHForce XP Exhausts Axle-Back 12-15 BMW 335i 3.0T (SS w/Black Tips) 2011-audi-a4-quattro-base-esi3961538 Made from high-quality 6063 aluminum

Made from high-quality 6063 aluminum alloy

20 Horsepower Gain

** Fitment Note: These are compatible with the 5

It is intended for vehicles that are either NOT equipped with AFM and NPP or have the AFM and NPP disabled

Built in CNC Machined Aluminum Blow Off Valve Adapter

aFe MACHForce XP Exhausts Axle-Back 12-15 BMW 335i 3.0T (SS w/Black Tips) 2011-audi-a4-quattro-base-esi3961538 Made from high-quality 6063 aluminumExhaust Valve: This axle back exhaust system incorporates a factory style exhaust valve which uses the factory exhaust valve motor (not included). The valve helps regulate, direct and control the flow of exhaust gases by opening, closing, or partially obstructing passageways depending on throttle position for maximum performance. Simple Installation; This MACH Force Xp axle back exhaust system uses factory mounting locations providing stability and a