Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Titanium Trims Model_(8P) 2.0 TFSI 2WD (5 Door) 2004-12 If you are unfamiliar as

If you are unfamiliar as to why this kit is so important

Suitable for 5 hours test bed running or 500mls/800kms on road

Sports Cat/De-Cat Front Downpipes - To standard and Cobra Sport Cat/GPF-Back exhaust fitment

sold separately)

If your friends went through this

Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Titanium Trims Model_(8P) 2.0 TFSI 2WD (5 Door) 2004-12 If you are unfamiliar asOur 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