The Hummer H3 5.3 V8 300hp (2006 - 2010) produces 300bhp and 430Nm in standard form. A Stage 1 ECU remap can raise output to 320bhp and 450Nm, a gain of 20bhp and 20Nm, with no hardware modifications required.
Interested in a Stage 1 remap for your Hummer H3? Get in touch and we will discuss the best options for your vehicle.
JSM Diagnostics comes to you. Mobile ECU remapping across Medway and the surrounding areas.
Call us: 07711 934 905
Mon – Fri: 8:30am – 5:30pm