Currently reading: Hennessey Mammoth 1000 TRX revealed as 1012bhp pick-up
Texan tuning firm reveals heavily upgraded Dodge Ram 1500 TRX with a 0-60mph time of 3.2sec

US tuning firm Hennessey has unveiled the Mammoth 1000 TRX, a heavily modified Dodge Ram powered by a 1012bhp 6.2-litre supercharged V8 engine that it claims is the most powerful and fastest-accelerating pick-up ever produced.

The Texan firm, which is best known in the UK for its range of hypercars including the forthcoming 311mph-plus Venom F5, will produce 200 of the new US market pick-ups and says it has already received orders for more than half. 

Company founder John Henessey said: “Why have a 1000-horsepower pick-up truck? Because we can.”

The Mammoth 1000 TRX is based on the Dodge Ram 1500 TRX and uses a heavily upgraded version of its supercharged Hellcat V8 engine. Hennessey has fitted a new high-flow supercharger, fuel injectors and an induction system, and has also reworked the unit’s calibration. As well as boosting the power output to 1012bhp, torque has been increased to 969lb ft.

Hennessey claims the modifications allow the Mammoth 1000 TRX to achieve the 0-60mph sprint in 3.2sec, with a quarter-mile time of 11.4sec. It will be offered in two stages, with the higher-level models featuring more extensive upgrades, including a crank case ventilation system and a high-flow filtration system.

Other upgrades available as part of the package include custom bumpers, LED lights, a front levelling kit, 20in wheels and up to 37in off-road tyres, which are designed to add even more presence and performance. They stretch the dimensions of the Mammoth 1000 TRX to 5811mm long, 2090mm wide and 1970mm high.

The truck can seat six adults, can cope with a payload of 1043kg and can tow a load weighing up to 3942kg.

The Mammoth TRX 100 costs around $150,000 (£100,000), including the stock TRX pick-up. Hennessey said that the truck was available for “customers across the US and around the world”. 


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James Attwood

James Attwood, digital editor
Title: Acting magazine editor

James is Autocar's acting magazine editor. Having served in that role since June 2023, he is in charge of the day-to-day running of the world's oldest car magazine, and regularly interviews some of the biggest names in the industry to secure news and features, such as his world exclusive look into production of Volkswagen currywurst. Really.

Before first joining Autocar in 2017, James spent more than a decade in motorsport journalist, working on Autosport,, F1 Racing and Motorsport News, covering everything from club rallying to top-level international events. He also spent 18 months running Move Electric, Haymarket's e-mobility title, where he developed knowledge of the e-bike and e-scooter markets. 

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Peter Cavellini 23 June 2021

Does available around the World mean available in countries who drive on the right also?, it's a best Drag strip Bunny.

Peter Cavellini 23 June 2021

I like to see that take a corner, and make it!, Tractor pulling big in the States, maybe that's what it's for?

russ13b 23 June 2021

Prefer the GMC Syclone, this is a whole bunch of trying too hard