You can request for a Tuning Calibration for your Hummer H3 2006 - 2010 3.7 242hp vehicle on our file service site.
These Tuning Calibrations always made in real time suited to your needs and cars maximum ability.
All our Tuning files are made with maximum precision and care to be efficient.
In this particular case, we can increase the power of your engine from 242 HP to 260 HP, 328 Torque to 350 Torque within a Stage1 Calibration package.