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, 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, relieving the turbo which in turn brings more power and lower exhaust gas temperature. The post-cat sensor may have to be programmed out. The downpipe is made of stainless steel except for the flanges, which are made of steel so they do not warp and thus prevent leaks. The flange surfaces are machined. There are 2 lambda sensor ports M18x1.5mm welded in.suitable for: - BMW 1 Series F20/F21 three-door + five-door 218hp - BMW 2 Series F22/F23 coupe + convertible 184hp + 245hp from 2014, adaptation work to turbo and downpipe as well as the brackets - 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! : In order to ensure high accuracy of fit, we regularly test our products; for this we then need vehicles on which we can test or install them, or the customer installs them themselves and provides us with photos for our documentation. In return, we offer the customer a 50% discount on the product.Registration: For single approval according to §21 StVZO, please ask your TÜV inspector.We would like to point out that the installation of this item constitutes a modification resulting in the expiration of the vehicle's operating license according to StVZO. Not approved for use on public roads.