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! For more information about the product, or any of our products, visit uspmotorsports.com
Audi, S4, milltek, exhaust, catback, downpipe, downpipes, B8, sound, non resonated