Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Cerakote Black Trims Model_(8P) 2.0 TFSI 2WD (5 Door) 2004-12 As with all AIRTEC products

As with all AIRTEC products

This results in improved durability and a significantly longer lifespan when compared to traditional copper or nickel spark plugs

it fits neatly behind the original bumper

5mm pipework and fits from the catalytic converter section backwards (Cat-back) these sports exhausts replace the centre and rear sections

For the cold-side pipework this increases to a massive 70mm to ensure maximum air flow and volume is achieved at the throttle body to maximise performance

Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Cerakote Black Trims Model_(8P) 2.0 TFSI 2WD (5 Door) 2004-12 As with all AIRTEC productsOur 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