Scope of delivery:- Downpipe for Audi A4 B7 2.0 TFSI ø 76mm with 200 cell racing cat/metal cat stainless steelDescription: - The downpipe sits between turbo and exhaust system. It is screwed to the original turbocharger and contains a 200 cell cat ø 120mm. It has a cross-section of 76mm in the upper area, two M18x1.5mm connections for lambda probe and, due to space, 63.5mm in the lower section. The larger downpipe reduces back pressure, relieves the turbo and allows for higher performance, depending on installed parts up to 350hp. To connect to the original exhaust, you need to use adapter 122515 and clamp 350208.Registration according to §21 StVZO must be carried out by an officially recognized expert. As exhaust gas behavior depends on several factors such as exhaust gas temperature, engine output, displacement, etc., the specified Euro norm cannot be guaranteed.suitable for: - Audi A4 B7 2.0 TFSI FWDRegistration: For individual approval according to §21 StVZO, please check with your TÜV inspector. We point out that installing this item constitutes a modification that voids the vehicle operating permit under StVZO. Not permitted for use on public roads.Optional matching parts: - Reducing sleeve from 63.5mm to original exhaust connection 55mm 122515 - Exhaust clamp 63.5mm 350208