Hummer H3 5.3 V8 300bhp tuning file

With a bespoke remap the Hummer H3 5.3 V8 300bhp gains +20 bhp and +20 Nm, rising from 300 bhp / 430 Nm to 320 bhp / 450 Nm (7% more power). We build each tuning file around the software number of your read on the Delco E38, so nothing generic goes back into the car. Add DTC Removal to the same file if needed.

Who is this remap for?

Naturally aspirated petrol engines gain less than turbo engines, but a remap still improves throttle response and smooths out flat spots in the power delivery. 300 → 320 bhp equals roughly 224 → 239 kW.

Figures are guide values from our rolling road and comparable vehicles. Results depend on the vehicle's condition, hardware and fuel quality. Remapping in the UK: let your insurer know about the modification. DPF, EGR and AdBlue solutions are supplied for off-road and motorsport use only and are not legal for use on UK roads.