Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-90 Cerakote Black Trims Trackslag For those looking to take

For those looking to take the style upgrade a stage further

these jugs are made to take abuse and keep performing

Please note: The 'UK/Europe: Pre-PPF' and 'Rest of the world' fitment options will not fit models equipped with a GPF (Gasoline Particulate Filter)

5db on the sound meter

has a sportier exhaust note

Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-90 Cerakote Black Trims Trackslag For those looking to takeOur 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