Scope of delivery: - Stainless steel downpipe for Audi A4 B7 2.0 TFSI FWDDescription: - The Y-pipe sits between the turbo and exhaust system. It is screwed onto the original turbocharger. It has a cross-section of 80mm in the upper section, two connections M18x1.5mm for lambda probe and, due to space, 63.5mm in the lower section. The larger downpipe reduces the back pressure, relieves the turbo, and more power can be achieved, depending on the components installed up to 350hp. To fit the original exhaust system you must use a reduction from 63>54mm, but usually, largerexhaust systems are used for tuning.suitable for: - Audi A4 B7 2.0 TFSI FWDRegistration: For an individual approval according to §21 StVZO please ask your TÜV inspector.We would like to point out that the installation of this article constitutes a modification which invalidates the vehicle's operating license in accordance with the StVZO. Not permitted for use on public roads.