If you thought 6×6 pickup trucks couldn’t get much crazier than they already were, the new Hennessey Mammoth 1000 6×6 TRX is here to make you change your mind. As the name suggests, it packs over 1,000-horsepower (735 kW) and sends it through six mammoth-sized tires. It’s one of the most powerful 6x6s on sale today and they’re only building 12.

It’s one thing to start out with a normal-ish pickup truck and make it fast. Hennessey does that to basically every major pickup on sale today. But it’s another thing to take the most extreme pickup on sale, the Ram 1500 TRX, and basically put it on steroids until it’s so muscular that the Rock would tremble in its shadow. That’s the Mammoth 1000 6×6.

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To hear John Hennessey tell it, that was exactly the plan: “Everything we do at Hennessey Performance is turned up to 11, but the Mammoth 1000 6×6 is definitely turned up to 12! Everything on the Mammoth 6×6 is bigger, badder, and more imposing – plus, it’s still super-fast while being a total powerhouse off-road. It’s the undisputed king of the road.”

It’s tough to validate that statement because comparing 6×6 trucks is sort of like comparing apex predators. They’re hard to get into a single space (in this case based on availability for the most part) and even if you managed it, picking a winner wouldn’t be all that simple. What we do know is that the Mammoth 1000 6×6 TRX is one of the most complete packages available.

Other 6×6 companies usually offer no power upgrade over the base vehicle and those that do often only turn up the boost on turbos or superchargers to achieve the effect. Hennessey goes considerably further by adding a totally different and more capable supercharger as well as a slew of supporting mods like upgraded injectors, a heavy-duty supercharger belt, and upgraded supercharger pulleys. All of that comes together during chassis dyno tuning where Hennessey says the truck will achieve at least 1,012 hp.

It’s that attention to detail that allows them to price this truck starting at $449,950 and it’s also why they can confidently offer a two-year or 24,000-mile warranty. Frankly, if you can drive this thing 24,000 miles over the course of two years we think you deserve a medal for taming the Mammoth.