The Alpha Competition decat downpipe is crafted from T304 stainless steel and boasts 2.5"" / 63mm pipework that is mandrel-bent and TIG-welded. This part is a straightforward bolt-on replacement for the turbo to front pipe on Audi A4 and A5 B8 / B8.5 2.0 TFSI models.Seamless bolt-on fitting M..