Audi S4 B9 Non sport Diff models - Non-Resonated (Louder) Cat-Back with Quad Cerakote Black Trims Audi > S4 > 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (Non Sport Diff Models) - Right Hand Drive Cars Only > 2016 and Later Active Sound (ASU) from Milltek

Active Sound (ASU) from Milltek Sport is an innovative solution to enable a user controllable exhaust sound to be made on vehicles that traditionally lack the sound and tone that owners desire

8 TSI performance exhaust consists of a 3" / 76

which will help with increased exhaust flow and can dramatically change the sound

subtly hinting at the performance upgrade underneath the car

Audi S4 B9 Non sport Diff models - Non-Resonated (Louder) Cat-Back with Quad Cerakote Black Trims Audi > S4 > 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (Non Sport Diff Models) - Right Hand Drive Cars Only > 2016 and Later Active Sound (ASU) from MilltekOur 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