Jeff Dunham’s Insane 750-HP Rat-Rod Humvee Is Unlike Anything on the Road

Military Hardware x Pop Culture

Comedian and car collector Jeff Dunham is known for owning vehicles that fall well outside traditional enthusiast norms. His extreme rat-rod Humvee featured on Jay Leno’s Garage perfectly reflects that reputation.

Underneath the exposed metalwork and oversized tires sits a 1987 AM General Humvee, originally engineered for military service rather than celebrity ownership. The High Mobility Multipurpose Wheeled Vehicle, or HMMWV, was developed in the 1980s as a rugged transport platform. General Motors has since revived the nameplate as an all-electric supertruck producing four-figure horsepower.

A 750-HP Rat Rod Built to Shock

The Humvee’s transition into civilian life began when Arnold Schwarzenegger encountered the military vehicle during film production and pushed for a road-legal version in the early 1990s. That effort eventually led to the creation of the Hummer H1. The civilian model quickly became a cultural symbol embraced by celebrities and collectors. High-profile examples such as Tupac Shakur’s customized H1 demonstrated how the military-derived truck evolved into a statement vehicle associated with fame, individuality, and excess.

Dunham’s Humvee started as a military-spec chassis but was later transformed into a promotional show vehicle by a Louisiana-based veteran-owned company. The truck now runs a 6.6-liter Duramax turbo-diesel V8 fitted with compound turbochargers. Output increased from roughly 350 horsepower to an estimated 750 horsepower. The drivetrain was also converted to rear-wheel drive, which reinforces its purpose as a visual showpiece rather than an off-road machine.

A Very Serious Build

Despite an estimated weight approaching 9,000 to 10,000 pounds, Jay Leno noted that the vehicle feels unexpectedly smooth on the road. An adjustable air suspension system allows the Humvee to sit flat on the ground or raise itself for driving.

The truck also uses fly-by-wire steering, eliminating a traditional mechanical connection between the steering wheel and front wheels. Massive 40-inch Mickey Thompson Baja tires, exposed engine components, and a spray-on bedliner exterior create the aggressive rat-rod appearance. However, the driving experience remains controlled, quiet, and far more refined than its appearance suggests.