Six appeal: Hennessey builds the first Mammoth 1000 6×6 TRX

Based on the Ram 1500 TRX, the Hennessey Mammoth 1000 combines six-wheel drive with a crazy 1,000 horsepower output.

Hennessey Mammoth 6x6 Truck

Hennessey has completed the first production example of its most exclusive six-wheel-drive truck.

The Mammoth 1000 6×6 TRX pickup is the largest vehicle ever made by the Texas-based tuning company. 

Measuring 283 inches in length, the addition of an extra rear axle means the standard Ram 1500 TRX is stretched by more than 50 inches.

Everything is bigger in Texas

Hennessey Mammoth 6x6 Truck

Along with more driven wheels, Hennessey also gives the Mammoth 1000 6×6 a boost in performance. The 6.2-liter Hemi engine gets an upgraded supercharger, performance air intake system and recalibrated ECU software. 

It all helps the Mammoth 1000 deliver 1,012 horsepower, with an equally astounding 969 lb-ft of torque. 

Further additions include 20-inch wheels, 37-inch off-road rubber, custom bumpers and extra LED lighting. 

Electric fold-out side steps, Hennessey embroidered headrests and a serial numbered plaque are also part of the Mammoth 1000 package.

A mammoth price tag

Hennessey Mammoth 6x6 Truck

Hennessey plans to build just 12 Mammoth 1000 TRX trucks each year, with global shipping available for customers outside the United States. 

Such wild performance does not come cheap, though. Buyers will need to find at least $449,950 (£346,115) to own a Mammoth, although this does include the cost of a base Ram TRX truck.

A two-year/24,000-mile warranty is included with every new Hennessey truck, too.

Company CEO John Hennessey said: “Everything we do at Hennessey Performance is turned up to 11, but the Mammoth 1000 6×6 is definitely turned up to 12! Everything 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.”

Alongside the Mammoth 1000 TRX, Hennessey is currently in the process of building its 311 mph+ Venom F5 hypercar.

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John Redfern
John Redfern
U.S. Editor with a love of all things Americana. Woodgrain-clad station wagons and ridiculous muscle cars a speciality.

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