BETA car for ProCharger P1 and D1 series supercharger and BETA car for Pedders XA suspension system. Car made 576rwhp/618rwtq on 9PSI only with the stock DOD (Displacement on Demand) valvetrain. Gains of ~267hp and ~283tq. The car has achieved over 1.1g in lateral acceration testing and has been fitted with Gen II CTS-V Brakes. This car is currently the highest horsepower P1-SC ProCharged car and is 1 of very few G8s tuned on E85. The car maintains a stock catback exhaust for great street manners