Audi S4 in for Milltek Exhaust and Custom SMS Tune

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 downย 253whp and...