The production will be limited to 200 examples

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Back in September 2020, Hennessey announced the introduction of a six-wheeled iteration of the 2021 Ram 1500 TRX called the Mammoth 6x6. The super-exclusive truck was limited to just three examples and was priced at half-a-million bucks a pop. Even though it sounded super exciting, a more practical version of the truck would’ve been a better option. It looks like Hennessey has answered our wishes.

The aftermarket company’s latest project is a 1,000+ Horsepower ‘four-wheeled’ version of the Ram 1500 TRX. It comes with a host of other mechanical additions and features. Hennessey has also announced that it will build 200 examples of this truck.

Hennessey Introduces a 1,000-Horsepower Ram 1500 TRX That Takes Just 3.2 Seconds to 60 MPH
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The Hennessey Mammoth 1000 is more than just a power boost. It comes with what Hennessey calls the Mammoth Off-Road Stage 1 Package. On the outside, it includes a custom front bumper with LED lights, an exclusive Mammoth a retractable electronic bed cover, and electronic fold-out steps. The truck rides on 20-inch, ten-spoke Hennessey wheels wrapped in 35-inch off-road tires.

A 2.5-inch lift kit and a front suspension leveling kit are also part of this package. Finally, it even comes with serial numbered plaques, since this is a limited-edition model.

In stock form, the 2021 Ram 1500 TRX comes with a 6.2-liter, supercharged V-8 HEMI Hellcat engine under the hood that makes 702 horses and 650 pound-feet of torque. Hennessey has pumped up these figures by 310 horses and 319 pound-feet of torque, which results in a power output of 1,012 ponies and 969 pound-feet of twist. This increase in power comes courtesy of add-ons like:

  • Upgraded 2.65L Supercharger System
  • Upper and Lower Pulley Upgrade
  • Stainless-Steel Long Tube Headers
  • High-Flow Catalytic Converters
  • Upgraded High-Flow Fuel Injectors
  • High-Flow Mid Pipes, Fuel Injectors, and Air Induction System
  • Crank Case Ventilation System
  • Hennessey Performance Engineering Calibration Upgrade
Hennessey Introduces a 1,000-Horsepower Ram 1500 TRX That Takes Just 3.2 Seconds to 60 MPH
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Power is still sent to all the wheels via the eight-speed, high-torque-capacity TorqueFlite 8HP95 transmission. In the standard form, the Ram 1500 TRX takes 4.5 seconds to 60 mph from rest, making it the quickest production pickup truck. But, thanks to these upgrades, this truck’s 0-60 mph time is cut short by a massive 1.3 seconds, which means the Hennessey Mammoth 1000 takes just 3.2 seconds to its sprint to 60 mph.

Ram had noted that the quarter-mile run can be completed in 12.9 seconds at 108 mph, but this upgraded truck completes it in just 11.4 seconds at 120 mph. While the top speed of the Hennessey Mammoth 1000 is not revealed, it has breached the Ram 1500 TRX’s top speed of 118 mph.

Hennessey has announced that it will make 200 examples of the Mammoth 1000 for the 2021 model year.

This means we could get more in the coming year, too. Surprisingly, the mod is actually quite reasonable, as per Hennessey’s standards. The aftermarket tuner is charging $135,350 for the build, which includes the cost of the 2021 Ram 1500 TRX that starts at $70,000. This, however, doesn’t include the price of shipping.

Hennessey is offering a two-year/24,000-mile warranty and says that each truck chassis dyno testing and road testing of up to 200 miles before delivering the truck to the owners. The company is now accepting orders and the deliveries will begin in the second quarter of this year.

Sidd Dhimaan
Associate Editor and Truck Expert - sidd@topspeed.com
Sidd joined the Topspeed.com team in 2017 as an intern and in less than a year he earned a full-time position as an associate editor and junior automotive expert. He is currently our pickup truck expert and focuses his attention on heavy-duty and off-road vehicles.  Read More
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