Black Mamba 3" (76 mm) to 2.5" (63.5 mm) Decat Downpipe for Mercedes-Benz A35 AMG W177, designed to replace the restrictive OEM catalyst for maximum exhaust flow and power gains. Crafted from premium T304 stainless steel with handmade TIG welds, this direct bolt-on downpipe delivers a proven 16hp ga..