These Alpha Competition decat downpipes are the ultimate upgrade for the 2.9 TFSI biturbo engine in the Audi RS4 B9 and RS5 F5. Made of high-quality T304 stainless steel, with handcrafted TIG welds and tubing that goes from 114.3 mm (4.5") to 76 mm (3"), they ensure maximum flow and a brutal sound. They directly replace the original catalytic converters and fit between the turbochargers and the front pipes without any modifications.

On a stage 1 setup, this delivers an average of +34 hp and a much more aggressive sound. You can optionally choose thermal insulation, which reduces heat radiation in the engine compartment by up to 50%. Quality and performance at a competitive price.

Advantages:
• Direct mounting – 100% fit without adjustments
• 2-piece set for left and right sofa
• Full T304 stainless steel
• Pipe diameter: 114.3mm (4.5”) from the turbo to 76mm (3”)
• Average +34 hp gain on stage 1
• Aggressive sound
• Thermal insulation – up to 50% less heat radiation
• Includes mounting kit
• Lifetime warranty against manufacturing defects