Audi B6 S4 <br />4.2L V8<br />OE Tuning ECU Tune dyno tested<br />Mods: Fast Intentions Cat-back Exhaust system <br />CA91 premium pump gas<br />Gains seen to the wheels from ECU tune: +30.4wTq@3500rpm & +23.3wHp@7200rpm<br />OBD2 flash
