aFe MACHForce XP Exhausts Axle-Back 12-15 BMW 335i 3.0T (SS w/Black Tips) 2011-audi-a4-quattro-base-esi3961538 Built in CNC Machined Aluminum

Built in CNC Machined Aluminum Blow Off Valve Adapter

Made from high-quality 6063 aluminum alloy

it is far from the only new design feature

This cat-back exhaust is constructed of 3" into 3-1/2" mandrel-bent 304 stainless steel tubing and comes complete with free-flowing high temp metallic black powder-coated muffler

aFe MACHForce XP Exhausts Axle-Back 12-15 BMW 335i 3.0T (SS w/Black Tips) 2011-audi-a4-quattro-base-esi3961538 Built in CNC Machined 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