Stage 4 High Output Kit +185 HP
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
your order please include your vin number in the section above. There
will be an additional core charge of $550 for the computer and a $300
core charge for the injectors that will be reimbursed when your original
computer is returned to us.
Stage 4 Extreme Kit +185 HP
Off Road Pipe
Cooling Upgrade (7)
Cooling increase is based on a scale of 1-10, ten providing the best possible increase in cooling over stock.