Audi S4 B9 Non sport Diff models - Resonated Cat-Back with Quad Polished Trims Model_318D (E90) Saloon 05-11 Filter Material: 15mm Dual Layer

Filter Material: 15mm Dual Layer Foam

For those looking to improve the styling further

- Milltek Sport are the sole UK distributor of HJS Tuning Catalysts

This part allows for increased potential airflow and slightly increased induction sound

Audi S4 B9 Non sport Diff models - Resonated Cat-Back with Quad Polished Trims Model_318D (E90) Saloon 05-11 Filter Material: 15mm Dual LayerOur 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