Quad Exit BMW 3-Series (F30/F31) Rear Panel DiffuserGloss Finish Fits: F30 Saloon and F31 Touring Models with M Sport bodykit This lower rear diffuser panel fits F30 and F31 models and attaches directly to the OEM fitting points of the M Sport rear bumper. Specifically designed to be fitted in conjunction with the Cobra Sport quad exit performance exhaust conversions for the BMW 3 series. This lower rear diffuser panel allows the conversion of the F30 and F31 diesel models to a quad exit exhaust system