Welcome to the finest catback exhaust for the B7 Audi S4 on the market.

The AWE Tuning B7 S4 Performance Exhaust is a direct bolt on catback system that not only transforms the rear end of the car with it's menacing quad tips, but also turns heads with a deep muscluar bass note.

AWE exhausts have earned praise from owners and the press alike, due to their unique "Jekyll and Hyde" personality. They spend considerable time and effort during development to achieve remarkable civility when idling and at part throttle cruising, while also producing a war-cry wail when full throttle is applied. AWE exhausts are like bespoke suits: each is hand made utilizing only the finest casing and packing materials, and they command respect without calling unwanted attention to themselves. Sophisticated, refined, and powerful, all at once.

Each cat back system features an H-Pipe crossover tube at the front to maximize exhaust scavenging for maximum power, as well as to take a harsh edge off the exhaust sounds. Tubing diameter for the entire system is 2.25". This is a deep bass tone, no matter how you cut it.

The Touring Edition, which offers an incredibly sophisticated yet pronounced tone.

Dyno proven for legitimate power gains of 14.2 HP and 14.8 FTLBS torque corrected to the crank on our in house Mustang AWD dynamometer, the B7 S4 Performance Exhaust is a must have for any B7 enthusiast.

Performance Specs

4.2L S4 Exhaust Dyno Testing

(Above) Here is our cat back exhaust system vs the stock exhaust system. Thanks to 2.25" tubing, free flowing mufflers, and a H-pipe balancer, there are great gains produced. This system produces peak gains of 11.1 wheel hp and 11.6 wheel tq. Using a 1.28 correction factor, this results in an impressive gain of 14.2 crank hp and 14.9 crank tq.