BMW 4 Series F32/F33/F36 Rear Diffuser — Gloss Black, Dual Exhaust (M Sport, 2013–2020)

For the BMW 4 Series F-chassis (F32 Coupé, F33 Convertible, F36 Gran Coupé) with M Sport bumper and twin left exit exhaust — our gloss black rear diffuser adds a sharper, more aggressive finish to the rear-end that integrates cleanly with the factory bumper flow. ⚠️ CRITICAL — Twin left exit exhaust only. This diffuser is designed specifically for the twin left exit exhaust configuration, where both exhaust tips exit on the left side of the rear bumper. It will NOT fit cars with twin right exit, quad exit, or single centre exit exhaust configurations. Please check your exhaust configuration before ordering. M Sport bumper only. This product also requires the M Sport rear bumper. It will not fit standard SE, Sport Line, or Luxury Line bumpers. Direct-fit compatibility — M Sport bumper with twin left exit exhaust only: BMW F32 4 Series Coupé BMW F33 4 Series Convertible BMW F36 4 Series Gran Coupé Common models with twin left exit exhaust configuration include 420i, 420d, 425d, and 430d. Please verify your exhaust setup by looking at your rear bumper — if both exhaust tips are on the left side, this diffuser fits your car. Manufacturer references: BMW, 4 Series, F32, F33, F36 are trademarks of BMW AG, used here solely to indicate product compatibility. AutoCap Solutions is an independent aftermarket retailer and is not affiliated with, endorsed by, or authorised by BMW AG. All AutoCap Solutions products are covered by our standard replacement policy in the rare event of manufacturing fault.