Collection: Audi RS4/RS5 B9,B9.5

The Audi RS4 and RS5 B9 share a 2.9-litre twin-turbocharged V6 and quattro all-wheel drive, and both carry serious tuning potential straight out of the box. At Proven Performance Parts, our RS4 and RS5 B9/B9.5 collection delivers real, reliable gains through Stage 1, Stage 2 and Stage 3 upgrades, including high-flow catted and catless downpipes, valved cat-back exhaust systems, performance intakes, turbo inlets, upgraded intercoolers, suspension and carbon fibre styling. Engineered to cut backpressure, reduce heat soak and improve airflow, these components unlock faster spool, sharper throttle response and a deeper V6 tone. Covering the RS4 Avant and the RS5 Coupe and Sportback from 2018 onwards, including the B9.5 facelift, in both OPF and non-OPF specifications.

Build with confidence and push your B9 to its full potential.