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USP Motorsports Audi B8 S4 Milltek Exhaust Sound Clip
For more information about suspension, visit: USP Motorsports installed a 3" Milltek Non-resonated system with downpipes on a customers Audi B8 S4 and the results sounded great. The video speaks for itself!

BMW 135i vs BMW 335i vs '12 Audi S4
A modded '08 135 auto vs a modded 6spd 335i vs a bone stock '12 S4 from a 40mph roll. Bonus race footage of the S4 & 335i doing a 20mph roll.

BMW E90 335 Sedan vs 335i Coupe.avi
-335 coupe Techtec ECU Custom Exhaust -335i sedan vishnu procede 2 AKRAPOVIC Exhaust System AR downpipe Tein SS suspension hre p40 single big Intercooler AFE Stage 2 Pro Dry S Air Intake System

Audi S4 v Audi RS4. Does Supercharging Rule? - /CHRIS HARRIS ON CARS
Can REVO Technik make a raggedy old S4 match the gorgeous new RS4? Drag race to find out.