Audi S5 B9 Sport Diff models with Brace Bars - Non-Resonated Cat-Back (Louder) with Quad Carbon Trims Non-OPF/GPF & Post Facelift) > 2018 to 2019 Click here to view the

Click here to view the product page for the upgraded internals

The new systems for the M135i are based around a cat back configuration with the option for either a resonated or louder non resonated centre section

60BHP more than the original A45

The surface is hardened and heat treated in 2 different stages

Audi S5 B9 Sport Diff models with Brace Bars - Non-Resonated Cat-Back (Louder) with Quad Carbon Trims Non-OPF/GPF & Post Facelift) > 2018 to 2019 Click here to view theOur 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