Stage 4 High Output Kit +185 HP
Our Stage 4 High Output Kit for your 1996-2003 H1 Hummer will make a huge difference to the overall power output, cooling and drivability of your H1 Hummer. The basis of the performance upgrade is the RapTorq Performance Computer system. This kit is designed to add a whole new level of performance with an additional 185 hp, on average, and improved cooling.
RapTorq Computer, RapBoost Turbo Boost Control Kit, RapJet High Performance Injector Set, RapFlow High Preformance Fuel Lifter Pump , Performance High Flow Air Filter, Equalizer Head Cooling System, Predator 4" Performance Exhaust System, RapCool PMD Isolator system, and Off Road Pipe.