Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-90 Burnt Titanium Trims Caption PPF / Resonator Delete This allows racers to reliably

This allows racers to reliably increase boost and advance ignition timing—without using high-octane racing fuel—for power gains of up to 20%

This button also allows users to cleat DTCs once the problem is resolved

enabling continued use of the M4 drive modes to adjust the dynamic of the exhaust

High film strength for ultimate protection

this is not compatible

Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-90 Burnt Titanium Trims Caption PPF / Resonator Delete This allows racers to reliablyOur 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