Scope of delivery: - Downpipe ø 102mm > 76mm for BMW 1 Series F20/F21 - 2 Series F22/F23 - 3 Series F30/F31/F34 - 4 Series F32/33/F36 made of stainless steel*Description: The downpipe has a diameter of 102mm from the turbo onwards, just before the flex pipe it reduces to 76mm. The connection to the exhaust is then 63mm. The ø 102mm downpipe significantly reduces back pressure, which relieves the turbo and provides more power and lower exhaust gas temperature. The post-cat sensor may need to be deactivated. The downpipe is made of stainless steel except for the flanges, which are made of steel so that they do not warp and thus prevent leaks. The flange surfaces are machined flat. Two M18x1.5mm lambda sensor ports are welded in.Compatible with: - BMW 1 Series F20/F21 3-door + 5-door 218hp - BMW 2 Series F22/F23 Coupe + Convertible 184hp + 245hp from 2014 - adjustment work to the turbo and downpipe and the mounts - BMW 3 Series + GT F30/F31/F34 320i/320ix/328i/328ix Sedan, Touring, Gran Turismo 184hp + 245hp N20 engine - BMW 4 Series F32/F33 420i/420ix/428i/428ix/440ix without OPF Coupe + Convertible 180hp + 245hp 326-360hp N20 engine50% discount! : To ensure a high level of fit accuracy, we regularly test our products, for which we need vehicles on which we can test or install them, or the customer installs it themselves and provides us with photos for our documentation. In return, we offer the customer a 50% discount on the product.Registration: For individual approval according to §21 StVZO, please ask your TÜV inspector.We point out that the installation of this item constitutes a modification that invalidates the operating approval of the vehicle under the StVZO. Use on public roads is not permitted.