H2 Stage 3 High Output Kit 2003-2007


Additional $450.00 ECM core charge applies at check out. Core must be received in good working condition within 30 days for full refund.
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Product Description

 Stage 3 High Output Kit +40 HP

The Stage 3 High Output Kit for 2003-2007 H2 will make a considerable difference to the overall drivability and longevity of your H2 Hummer. The basis of this performance upgrade is our unique proprietary & copyrighted RapTorq ECM. This kit instantly adds up to 40 horsepower! The Stage 3 Wake Up Kit provides exclusive, full range Dynamic Spectrum Tuning of air/fuel ratio, ignition advance, Performance Headers, High flow exhaust, upgraded intake system, and various other parameters for ultimate power gains and optimal mileage. This kit is designed to add a whole new level of performance gains to your H2!

  • • Power gains across entire power band, not just at full throttle
  • • Improves throttle response, acceleration, and low-end torque
  • • Provides performance gains up to 122 horsepower
  • • Increased  fuel pressure
  • • Performance Intake
  • • Performance Headers
  • • 3″ Performance Exhaust

Stage 3 – This stage is for mildly modified H2 vehicles. Fuel, Air (intake/outtake), Exhaust, and Timing-Curves are modified and designed to burn lower-octanes at peak efficiency. The increased fuel pressure, High flow intake, Performance Headers, and exhaust system will dramatically improve performance gains with optimal mileage at these peak horsepower gains. Drivers can use low-cost regular octane fuel for potential mileage gains or mid-grade and higher-fuel for optimal performance gains.

Kit Includes:


Air Intake



RapTorq High Performance ECM

Our unique proprietary & copyrighted Predator RapTorq ECM was engineered over a 22 month span with specific testing and development by our in-house Predator Motorsports engineering team.

During the development phases of our RapTorq ECM, our engineering team included a full evaluation of all available ECM programs by our competitors. While it remains standard practice to only modify the factory GM fuel-delivery curve. Our RapTorq ECM features a completely re-engineered “fuel-delivery curve &start-of-injection timing curve”. This design is engineered to optimize the H2’s combustion chamber providing peak efficiency and rapid power gains across the engines entire power band.

Our RapTorq ECM programming provides rapid throttle response from light-throttle to full heavy-throttle performance power. In conjunction with power gains, Fuel Economy is also improved on an average of 10-20% throughout all operational conditions. The primary goal was to create superior drivability with a maximum power curve within the OEM GM exhaust-gas temperature limits.

Power increased by 64hp & 79ft/lbs of torque providing Rapid Torque & Horsepower gains!

K&N Air Filter / Intake System

H2 Performance Intake with air filters from K&N will help your Hummer run better!

  • Designed to increase horsepower & torque for the 2003-2007 H2 Hummer
  • Washable & Reusable
  • This K&N H2 air filter lasts the lifetime of your vehicle

Power increased by 15hp & 100% emissions legal providing Rapid Horsepower gains!

3″ Performance Exhaust

What can a 3” Predator Performance Exhaust System do for your H2? Dramatically improve your H2’s tone, increase in horsepower, and Fuel Economy.

Having that extra boost in power can also make your life a lot more fun in off-road terrain. Giving you that extra push you need to keep from getting stuck. If you live at a high elevation and often find your H2 struggling a little to climb steep roads, the extra power added by our 3” Performance Exhaust System can help you out there too.

Power increased by 24hp & 100% emissions legal providing Rapid Horsepower gains!

 Mandrel-Bent Performance Headers

Engineered with heavy duty features and patented technology, these headers deliver serious performance gains without compromising your vehicles emissions equipment. The result is a significant increase in horsepower and torque throughout the RPM rang. Bolting on a set of our precision made Headers will increase your engines breathing ability and overall efficiency.

  • 3/8″ single piece laser-cut flanges
  • 14 ga. mandrel-bent primary tubes
  • Patented Collector
  • Easy bolt-on installation
  • Will not void factory warranty
  • C.A.R.B. certified 50 state smog legal
  • Limited lifetime warranty

Power increased by 19hp &  24ft/lbs of torque – 100% emissions legal providing Rapid Horsepower gains!

**Available in Chrome, Stainless, & Ceramic Coatings!

When placing your order please include your vin number in the comments section of the order form. Also, a $450.00 ECM core charge applies. Core charges will be refunded within 30 days once the core has been received.

**We highly recommend installing & testing your Raptorq ECM before returning the core.

**Limited lifetime warranty and a full 30 day money back guarantee

**Available in Stage 1, 2, & 3! Dyno tested to ensure top horsepower and drivability.

Please contact Predator for more information on our line of RapTorq Performance Upgrades.




Additional Information

Weight 76 lbs
Dimensions 48 x 24 x 12 in