Mil-Spec Builds The Ultimate 500HP Diesel Tactical Humvee

Behold: the 500bhp, $295k ‘tactical’ Hummer H1
Mil-Spec Auto’s latest military-inspired custom H1 build is a beefy fellow indeed(Credit: Mil-Spec Automotive)

Known for incredibly detailed one–of–a–kind Hummer customizations, Mil-Spec Automotive is debuting their newest bespoke build, #006. The sixth new H1 from the Detroit-based company features a sleek slant-back and an overall design heavily inspired by its celebrated military platform. Aiming for the perfect blend of tactical-inspired power paired with modern engineering, #006 represents the finest H1 build yet from Mil-Spec Automotive.

Mil-Spec Auto’s custom H1 build includes matching luggage from Pelican(Credit: Mil-Spec Automotive)

So much of the automotive industry these days is pushing for smaller, cleaner, electric intelligence. But some still like ’em big and heavy and dumb, and nothing hits that holy trinity quite like a Hummer. Mil-Spec Auto has released its latest military-inspired custom H1 build, and it’s a brute.

I’m sorry, giant H1, you can’t hide behind twigs(Credit: Mil-Spec Automotive)

Around 80 grand will get you a standard Hummer H1, but you’ll need to fork out just under US$300K to take things to this level. Based north of Detroit, Mil-Spec Automotive takes H1s, strips them to the bare bones, and rebuilds them from the ground up with a focus on even tougher off-road capability as well as a touch of comfort and luxury that’d be completely alien to anyone who’s ever driven one of these things in actual military spec.

38×13.50R20 Nitto Ridge Grappler tires on 20×9.5 Black Rhino Armory beadlock wheels give it that M*A*S*H look(Credit: Mil-Spec Automotive)

This is build #006 of 12 “Launch Editions” to be built. It’s a slant-back H1 with an LBZ-version 6.6-liter Duramax motor from the 2006 Alpha H1 that’s far from standard – we’re talking 500 horses and 1,000 lb-ft (1,356 Nm) of torque, a healthy increase from the 360hp/650 lb-ft (881 Nm) they were making out of the factory. The standard transmission wouldn’t handle that kind of torque, so it’s been beefed up with an Allison 6-speed worked over by MSA.

The custom H1 build boasts a 12,000-lb winch for getting out of bogs(Credit: Mil-Spec Automotive)

Indeed, the standard AWD drivetrain’s been yanked as well, replaced with a more recent unit from a GM HD truck that makes this thing rear-wheel drive only until the wheels start slipping. The axles themselves get upgraded to the military versions from the Humvee, with a selectable ARB Air Locker on the rear.

That’s what I call a rear bumper – get bumped with that, and you’ll stay bumped(Credit: Mil-Spec Automotive)

The powder-coated frame features re-engineered engine mounts and a whole new aluminum welded floor, designed to help reduce road noise. There’s also a bunch of sound-deadening material packed throughout the chassis and cabin “to overcome the H1’s rattly DNA.”

Interior has been completely overhauled(Credit: Mil-Spec Automotive)

The Air-Ride suspension system is a beauty, adding about four inches of ride height adjustment to let you crank this thing up on a set of RideTech pneumatic airbags for heavy duty off-roading. It’s self-leveling, automatically compensating for back-seat passengers or cargo, and the shocks are 8-way adjustable for damping.

Runs a 500-hp, 1,000 lb-ft Duramax motor(Credit: Mil-Spec Automotive)

If you’re masochistic enough to try to maneuver this thing into a supermarket parking space, you can take some solace from the fact that the Deep Sky Black paint is kevlar-infused for durability. Mind you, there are colossal bull-bars on the front and back (complete with a 12,000-lb (5,443-kg) winch), so the other guy’s probably going to come off worse, and there’s a reversing camera to help make sure it’s not your fault.

A boxy looking thing from the front(Credit: Mil-Spec Automotive)

Let’s take a look at the interior, which is finished in marine-grade canvas and two-tone black leather with all-weather vinyl instead of carpet. Only the front seat brackets remain from the original cabin – the dash is replaced with an in-house design featuring retro-style analog gauges including an altitude readout, GPS speedo and performance-capturing capability to capture your hero statistics.

An entirely overhauled drivetrain makes #006 rear-wheel drive only until things start slipping(Credit: Mil-Spec Automotive)

Conveniences include four cup holders, vintage style air-con outlets, a stack of USB and 12-V power outlets, a marine-grade nine-speaker JL Audio stereo system, an on-board air compressor and tire inflation hose and dual batteries to keep you juiced up when you’re running things off the power outdoors. The customer in this case has also asked for paracord grab-handles and some cute matching luggage from Pelican.

Quite a squat thing from the side(Credit: Mil-Spec Automotive)

It’s huge and nasty, with a certain kind of capable, adventurous class to it if you can look past the rampant crass wastefulness that pervades it from the donor vehicle out. Personally I’d love to take it for a drive, off-road if possible and far from the wagging little fingers of pedestrians at the lights.

Source: Mil-Spec Automotive

The Mil-Spec Auto #006 bespoke Hummer H1: stick that in your G-Wagen(Credit: Mil-Spec Automotive)
60-inch Baja Designs light bar on top of the windshield(Credit: Mil-Spec Automotive)
Offset aluminum snorkel should make light work of river crossings(Credit: Mil-Spec Automotive)
Air-Ride suspension is self balancing and offers up to 4 inches of pneumatic lift for serious off-roading(Credit: Mil-Spec Automotive)
Cabin is entirely gutted and rebuilt from scratch(Credit: Mil-Spec Automotive)