Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-100 Titanium Trims New Mini > Mk2 > (R58) Cooper S Coupe�� > 2011 to 2015 almost unrestricted air flow while

almost unrestricted air flow while maintaining filtration levels critical to ensure the longevity of your engine

I found the non-resonated to be slightly uncomfortable at motorway speeds

The constant flaking effect of normal wear of moving parts

80mm Intake Diameter

Along with increased performance

Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-100 Titanium Trims New Mini > Mk2 > (R58) Cooper S Coupe�� > 2011 to 2015 almost unrestricted air flow whileOur 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