Your Vehicle
Hummer H3 5.3 V8 300hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Book your Stage 1 remap
499 € VAT included · pay online, the work is done at the workshop you choose
Power Graph
Hummer H3 5.3 V8 300hp: da 300 a 320HP
Remapping Hummer H3
MasterTuning is a leader in developing remapping for Hummer. La Hummer H3 5.3 V8 300hp può passare da 300 HP a 320 HP con un incremento di 20 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Hummer H3 5.3 V8 300hp
The Hummer H3 5.3 V8 300hp is equipped with a petrol engine that produces 300 HP and 430 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Hummer can achieve 320 HP (+7%) and 450 Nm (+5%).
Our Stage 1 tuning for the H3 2006 - 2010 delivers an impressive gain of +20 HP and +20 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code LH8 identifies this specific powerplant configuration. The Delco E38 / Delco E67 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 300 HP from factory, this Hummer H3 is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — Hummer H3 5.3 V8 300hp
Factory technical data for the Hummer H3 5.3 V8 300hp (2006 - 2010), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | LH8 |
|---|---|
| ECU / Control unit | Delco E38 / Delco E67 |
| Fuel | Petrol |
| Compression ratio | 9.6 |
| Bore × stroke | 96.0 X 92.0 mm |
| Stock power | 300 HP · 430 Nm |
| Remapped power (Stage 1) | 320 HP (+20) · 450 Nm (+20) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your Hummer H3.
Frequently Asked Questions - Hummer H3
How much power can I gain from remapping my Hummer H3?
With MasterTuning Stage 1, your Hummer H3 5.3 V8 300hp can gain +20 HP (from 300 to 320 HP) and +20 Nm of torque. This represents a 7% increase in power.
Is ECU remapping safe for the Hummer H3 engine?
Yes, MasterTuning's remapping for the Hummer H3 5.3 V8 300hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the LH8 engine.
Is the Hummer ECU remapping reversible?
Absolutely. The original factory calibration of your Hummer H3 is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Hummer warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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