Audi S4 B9 Non sport Diff models - Non-Resonated (Louder) Cat-Back with Quad Polished Oval Trims Caption Quad Exit GPF Back These filters are direct replacements

These filters are direct replacements for the OEM air filter in your car

For the cold-side pipework this increases to a massive 70mm to ensure maximum air flow and volume is achieved at the throttle body to maximise performance

Proven reduction in charge temps

With the non resonated cat back exhaust option fitted and the vehicle in sport mode

CUPRA's all-new Leon 300 builds on two decades of successful SEAT performance cars

Audi S4 B9 Non sport Diff models - Non-Resonated (Louder) Cat-Back with Quad Polished Oval Trims Caption Quad Exit GPF Back These filters are direct replacementsOur range of Cat Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and or add a more suitably aggressive tone. All our products are made from 304L Aircraft Grade stainless steel. This quality material will ensure that your Cat Back system