Monday, June 21, 2021
News The Hennessey Mammoth Is A 1,200HP 6X6 Ram TRX

The Hennessey Mammoth Is A 1,200HP 6X6 Ram TRX

The Hennessey Mammoth is only the most insane truck ever and you can order starting on September 4th.


  • This is the most powerful truck ever built by Hennessey.

  • Powering the Mammoth is a tuned 7.0-litre Hellephant engine.

  • It will be priced from $500,000, and only three will be built.


The Ram TRX, while not a surprised, stunned truck fans with its incredible and credible off-road specs and monster power. As they say, too much is never enough so Hennessey will attempt to deliver too much by building and selling the 1,200-horsepower Mammoth complete with 6-wheel-drive.

Hennessy’s been around for just shy of 30 years and they’ve built plenty of crazy vehicles. But even Hennessey admits that the Ram TRX-based Mammoth is beyond insane.

2021 RAM 1500 TRX | Photo: RAM

“We are very excited about the Ram TRX,” said company founder and CEO, John Hennessey.  “MAMMOTH 6X6 powered by a 1200 HP Hellephant motor is just a completely ridiculous idea, which is exactly why we are doing this.  We are only going to build three examples which will likely make this the most exclusive and most expensive truck we’ve ever built.”

Starting with a new Ram TRX, Hennessey will relieve the 702-horsepower supercharged Hellcat V8 from duty and replace it with a specially tuned 7.0-litre Hellephant engine which will deliver over 1,200 horsepower. They will also be converted to 6×6, get a full bed conversion, an upgraded off-road suspension, unique interior, new bumpers, and more.

Hennessey Velociraptor | Photo: Hennessey

Hennessey has built 15 VelociRaptor 6X6 and GOLIATH 6X6 trucks for customers around the world, making them extremely exclusive. As for the Mammoth, only three will be assembled, making them all but entirely unique. Interested customers will have to call Hennessey directly on September 4, 2020, at 12-noon central time to place an order.

Trending Now

Average Vehicle Age Reaches A Record 12 Years In The US

Improved quality and durability are important factors. Rising new vehicle and soaring used car prices are also responsible for this trend. Overall vehicle quality...

Ken Block Fans: Now’s Your Chance To Own The Hoonitruck

It is being offered for $1.1 million. It has starred in Climbkhana and Gymkhana videos. It’s fast and burns tires. Ken Block is a...

Chevrolet Will Cover Level 2 Home Charging Outlet Installation Costs

The catch is that you need to get a new 2022 Chevrolet Bolt EUV or Bolt EV. Chevy understands that owners do 80%...

Upcoming Porsche Cayenne Variant Sets New ‘Ring Record

New Cayenne smashes RSQ8's previous best Hot SUV will finally be revealed soon The next quick Cayenne has just come back from the Nurburgring...

Fisker Ocean SUV Production Begins On November 17th, 2022

It will be assembled at Magna’s carbon-neutral facility in Graz, Austria. The Ocean SUV will be built on a Fisker modified Magna-developed electric...
Matt St-Pierre
Matt St-Pierre
Trained as an Automotive Technician, Matt has two decades of automotive journalism under his belt. He’s done TV, radio, print and this thing called the internet. He’s an avid collector of many 4-wheeled things, all of them under 1,500 kg, holds a recently expired racing license and is a father of two. Life is beautiful. Send Matt an emai

LEAVE A REPLY

Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.