Installation Instructions: S45003CF Available Here 2017-2021 BMW M240i, 3.0L3" Axle-Back, Dual Rear Exit, T304 with CF The MBRP Advantage: 4" OD Dual Wall Carbon Fiber Tips Included Moderate Sound Level Eliminates Factory Exhaust Valve, No Simulator Required Up to 25% Increased Flow Over Stock Want More? Click the Image: *Cutting OEM...