These stainless steel made Alpha Competition downpipes, in 4.5" / 114.3mm > 3" / 76mm diameter, fit without modification between the turbos and the front pipes of the 2.9 TFSI engines fitted to the Audi RS4 B9 / RS5 F5 (without OPF/GOF) in order to remove the catalysts. Manufactured from high quality T304 stainless steel with handmade TIG welds, these downpipes will bring an average gain of 34hp on a stage 1 engine and a particularly aggressive sound. With a high flow structure and optional thermal insulation to reduce heat radiation by 50%, these downpipes clearly represent the best value for money on the market !

- Select your version -

Direct mounting

2-piece kit

100% T304 stainless steel

4.5" / 114.3mm > 3" / 76mm pipes

Optional specific thermal insulation

Measured gain on stage 1 : 34hp

Aggressive sound

Handmade TIG welds

Assembly kit included

Lifetime warranty

- ECU calibration is mandatory -

- Not compatible with OPF/GPF equipped versions -