Black Mamba 3.5" (90 mm) Decat Downpipe for VW Golf 7 R, Audi S3 8V, and Seat Leon 3 Cupra 4WD, engineered for optimal performance and exhaust flow. Constructed from premium T304 stainless steel with handmade TIG welds, this direct bolt-on upgrade delivers a proven 25hp gain on Stage 1 setups, along..