Audi S4 in for Milltek Exhaust and Custom SMS Tune
Milltek Exhaust and Custom SMS Tune
Audi B6 S4 V8 Convertible
This red-hot Audi S4 Convertible checked in for Milltek Cat-back exhaust installation and custom Solo Motorsports Tune on our in-house dyno. This V8 powered S4 put down 253whp and 278wtq.