Audi S5 B9 Sport Diff models without Brace Bars - Resonated (Quieter) Cat-Back Exhaust System with Quad Black Oval Trims tiguanmk1 The de-cat exhaust version is

The de-cat exhaust version is sold for motorsport and off road use only and will NOT be able to pass a UK MOT emissions test or police roadside checks

The M3 development has been based around a valved cat back exhaust with the addition of a secondary de-cat (catalyst bypass) exhaust upgrade

once the module is installed it will default valve behaviour to be as follows

The Cobra Sport system really improves the drivability of this car and takes it to the next level

5" Monster downpipe

Audi S5 B9 Sport Diff models without Brace Bars - Resonated (Quieter) Cat-Back Exhaust System with Quad Black Oval Trims tiguanmk1 The de-cat exhaust version isOur 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