Scope of delivery: - Catless Downpipe for BMW F20 F21 M135i, F22 F53 M235i, F30 F31 F34 335i, F32 F33 F36 435i N55B30Product description: The 76mm downpipe significantly reduces backpressure, relieving the turbo—which in turn delivers more power and lower exhaust gas temperatures. The post-catalyst sensor must be deactivated. The downpipe is made of stainless steel except for the flanges, which are made of steel to prevent warping and thus avoid leaks. The flange surfaces are machined. Two M18x1.5mm lambda sensor connections are welded in.Suitable for: - BMW M135i F20 5-door 235kW/320hp Engine code: N55B30 up to model year 06/2013 - BMW M135i F21 3-door 235kW/320hp Engine code: N55B30 up to model year 06/2013 - BMW M235i F22 Coupe 240kW/326hp Engine code: N55B30 up to model year 06/2013 - BMW M235i F23 Convertible 240kW/326hp Engine code: N55B30 up to model year 06/2013 - BMW 335i F30 Sedan 225kW/306hp Engine code: N55B30 up to model year 06/2013 - BMW 335i F31 Touring 225kW/306hp Engine code: N55B30 up to model year 06/2013 - BMW 335i F34 Gran Turismo 225kW/306hp Engine code: N55B30 up to model year 06/2013 - BMW 435i F32 Coupe 225kW/306hp Engine code: N55B30 up to model year 06/2013 - BMW 435i F33 Convertible 225kW/306hp Engine code: N55B30 up to model year 06/2013 - BMW 435i F36 Fastback Sedan / Grand Coupe 225kW/306hp Engine code: N55B30 up to model year 06/2013Registration: For individual approval under §21 StVZO, please contact your TÜV inspector. We point out that the installation of this item constitutes a modification that invalidates the vehicle’s operating permit under the StVZO. Use on public roads is not permitted.