Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Burnt Titanium Trims Genuine+VAG During the design stages

During the design stages

Static Sound Example - Quad Exit Single Valved GPF Back

As the cat/de-cat section is removable it's easy to change between a sports catalyst or a de-cat pipe if you're running on the road and circuit

The sports cat exhaust version will enable you to pass a UK MOT emissions test or police roadside checks

Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Burnt Titanium Trims Genuine+VAG During the design stagesOur 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