Take your V12 twin-turbo 600 to the next level of performance with RENNTECH's Package 1 ECU/TCU upgrade. Stock- 493 HP @ 5000 RPM; 590 LB-FT @ 1800-3500 RPM RENNTECH PKG1- 625 HP @ 5000 RPM; 745 LB-FT @ 1800-3500 RPM