Audi RS4 B9 and Audi RS5 F5 Armytrix Decat Downpipes

Made from high quality T304 stainless steel available without specific treatment or covered with a ceramic coating to limit thermal propagation, these Armytrix decat downpipes intended for the Audi RS4 B9 and RS5 F5 offer a particularly aggressive sound and a significant power gain. With a 4"/ 101mm primary diameter reduced to 3" / 76mm , these downpipes are equipped with a cat simulator to prevent check engine light due to stock catalyst removal.