Road Test: 2003 Lingenfelter Hummer H2

They're everywhere. Wherever you turn, you're almost guaranteed to see a new Hummer H2 cruising down the street or bounding over boulders. We, too, like the H2--so much so that we flogged one on a colossal drive from the Arctic Ocean to Key West, Florida.

Yet, our biggest criticism was that, despite its powerful 6.0-liter V-8, the H2 could use even more oomph. Moving 6500 pounds of boxy weight doesn't happen easily with only 315 horsepower on tap. That's where ace-tuner Lingenfelter Performance Engineering comes in. More...