Black Mamba 4.5″ (114.3 mm) > 3″ (76 mm) Decat Downpipes for Audi RS4 B9 and RS5 F5 2.9 TFSI, expertly crafted from T304 stainless steel for maximum durability and performance. This 2-piece kit eliminates the factory catalysts, delivering a significant power gain of up to 34hp on Stage 1 setups, while the high-flow design ensures an aggressive exhaust note. Optional thermal insulation reduces heat radiation by 50%, making it an ideal upgrade for serious performance enthusiasts.

Direct bolt-on installation

2-piece kit for optimal fitment

Constructed from premium T304 stainless steel

Pipe diameter: 4.5″ (114.3 mm) > 3″ (76 mm)

Handmade TIG welds for superior strength

Optional thermal insulation for heat management

Aggressive exhaust tone

Installation hardware included

Lifetime warranty

ECU recalibration required

Not compatible with OPF/GPF-equipped models