Colossal 6x6 Hennessey® Mammoth™ Thunders Off Production Line


Sealy, TX

April 19, 2022

6X6 Hennessey MAMMOTH TRX Now In Production

Hennessey® starts build of its biggest and most exclusive six-wheel-drive truck 6.2-liter supercharged Hellcat V8 | 1,012 bhp | 969 lb-ft torque | 283-inches (719 cm) long
  • Mammoth™ 6×6 is biggest truck ever created in Hennessey®’s 30-year history
  • Just 12 Hennessey® Mammoth™ 1000 6×6 TRX trucks will be built each year, priced in excess of $449,950
  • Everything is bigger in Texas – New Hennessey® 6×6 is terrifyingly imposing, monstrously capable, and unthinkably fast
Hennessey®, the Texas-based hypercar manufacturer and high-performance vehicle creator, has started building its biggest ever truck, the 1,012 bhp, 283-inch (719 cm) long Hennessey® Mammoth™ 1000 6×6 TRX. At almost seven feet high and 88 inches wide, the enormous 6×6 pickup truck dwarfs ordinary cars and trucks. It has the power to match its presence, with Hennessey®’s engineers boosting performance of the stock Dodge Ram TRX engine by more than 300 horsepower to 1,012 bhp. The torque needed to propel the monster truck is enhanced similarly, totaling 969 lb-ft (1,314 Nm) after a 319 lb-ft (433 Nm) uplift by Hennessey®. Alongside performance upgrades, the new truck features a mountain of off-road kit from locking rear axles and Bilstein suspension, to 20-inch wheels clad in 37-inch off-road tires. The 6×6 Mammoth™ builds on the base Ram TRX adding a third axle, extending the truck’s length by more than four feet and creating a cavernous load-space. John Hennessey®, company founder and CEO: “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.” Priced from $449,950 – inclusive of the base Ram TRX – the four-door Mammoth™ 6×6 features uprated front and rear bumpers and a dazzling array of LED lights alongside a bespoke interior, which adds to the exclusivity of this special vehicle. Under the chest-height hood, the truck features a mighty 6.2-liter Hellcat V8 engine – a beast even in stock form. The Hennessey® team builds on this foundation adding a high-flow 2.65L supercharger, fuel injectors and high-flow induction system alongside performance-boosting calibration. Hennessey® has a track record of success when it comes to gigantic and exclusive 6×6 trucks. The company has built and delivered more than 20 VelociRaptor® 6×6 and Goliath® 6×6 Silverado trucks to clients all around the world. This solid performance in the three-axle world has its foundation in the highest standards of customer satisfaction, with Hennessey® priding itself on the quality of its vehicles and workmanship. Underscoring this dedication to quality and customer car, all Hennessey® models are offered with extensive warranties. The Mammoth™ is no different, benefitting from comprehensive 2-year / 24,000-mile cover. Available for global shipping, the new Hennessey® Mammoth™ 1000 6×6 TRX can be ordered now through authorized Ram retailers or directly with Hennessey®, by calling +1 979.885.1300 or visiting

Media Contact:
Jon Visscher:

About Hennessey®:
Based in Sealy, Texas, the Hennessey® business comprises Hennessey Special Vehicles, Hennessey Performance (HPE), Tuner School, and the Lonestar Motorsports Park. The company has re-engineered more than 12,000 vehicles for performance enthusiasts from around the world to deliver unparalleled driving thrills. Alongside modifying a diverse range of sports, and muscle cars since 1991, the company also applies its high-performance expertise to trucks and SUVs – and boasts its own hypercars – the Venom GT and the Venom F5.

Every Hennessey® product is dyno-proven, fully track-tested, street-legal and warrantied. Customers can choose from road-ready performance-enhanced cars by Hennessey® from a wide variety of brands including Chevrolet, Dodge, Ford and Jeep in addition to benefitting from a host of high-performance upgrades.

With its own test track, engineering curriculum for aspiring tuners, more than 80 team members and capacity to work on 40-50 vehicles at a time, Hennessey® Performance is one of the world’s leading specialist vehicle engineering companies. The new 6.6-litre V8 Venom F5 hypercar is set for customer deliveries in 2022. Boasting 1,817 hp and a +311 mph top speed, the company is guaranteed to deliver like never before on its mission of ‘making fast cars faster’.

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