Black Mamba 3.5" (90 mm) Decat Downpipe for Audi RS3 8.5V and TTRS Mk3 2.5 TFSI Evo, expertly crafted from premium T304 stainless steel. This high-flow downpipe is designed for maximum exhaust flow and aggressive sound while offering an optional anti-thermal stainless steel heat shield to reduce eng..