We can’t figure out why, but Geiger equips the Hummer H3 GT with an engine tuning kit that raises the V8’s maximum performance to 300 Hp. That’s just a mere 5 Hp more than the standard 5.3-liter V8 unit’s output. To complement the 5Hp power boost (…) the German tuner provides a sport suspension, which lowers the ride height of the SUV.
Via: Motorpasion , Source: GeigerCars