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Hennessey Starts Build Of MAMMOTH 1000 TRX Truck

Enhanced with a 6.2-liter supercharged V8 boasting 1,012 hp and 0-60 mph in 3.2 seconds.


Hennessey Performance Engineering (HPE), the Texas-based hypercar manufacturer and high-performance vehicle builder, has started production of the world’s most powerful pickup truck, the Hennessey MAMMOTH 1000 TRX with its upgraded 6.2-liter supercharged Hellcat V8 boasting 1,012 hp.

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Based on the 702 hp Dodge Ram 1500 TRX pick-up truck, the high-performance-focused enhancements by Hennessey cut the 0-60 mph time to just 3.2 seconds – the quickest in the world – while torque grows to 969 lb-ft. With modifications including a high-flow 2.65L supercharger, fuel injectors and high-flow induction system alongside performance-boosting calibration, the 6.2-liter V8 truck can achieve an 11.4-second quarter mile at over 120 mph.

John Hennessey, company founder and CEO: “The new MAMMOTH 1000 TRX is the most powerful pickup truck that Hennessey Performance has ever offered. The Ram TRX already boasts the highest horsepower of any vehicle manufacturer’s pickup, so our performance, styling and off-road enhancements make this the most formidable new truck you can buy. We’ve already sold more than 100 trucks, with each answering one big question – why have a 1,000-horsepower pickup truck? Because we can!”


Measuring 228.9 inches (5.81 meters) long, 82.1 inches (2.09 meters) wide and 77.6 inches (1.97 meters) high, the imposing hypertruck makes an enormous statement on the road. Capable of carrying six adults in comfort, carrying a payload exceeding 2,300 lbs and towing more than 7,700 lbs, the Mammoth is the most comprehensive and capable performance truck on the market.

Including buying the stock TRX, owners opting for the Mammoth 1000 will typically pay in the region of $150,000 for their build. The majority of owners will take a highly-specified stock model, and add the Mammoth 1000 package and the Stage 2 off-road enhancements. The popular Stage 2 package adds custom bumpers, LED lights, a front levelling kit, 37-inch off road tires and upgraded electronic fold-out steps. The Mammoth 1000 TRX complete turnkey package also comes with a 2 year / 24,000-mile warranty.


Hennessey will ensure exclusivity for its customers by limiting production volumes of the Mammoth 1000 with each truck fitted with a special chassis plate recording its build number. Just 200 will be produced in 2021 for customers across the US and around the world. Orders can be placed through authorized Ram retailers or Hennessey directly by calling 979.885.1300 or visiting

Specifications: Mammoth 1000 TRX

1,012 bhp @ 6,500 rpmMammoth Custom Front Bumper
969 lb-ft torque @ 4,200 rpmMammoth Custom Rear Bumper
LED Lights in Front Bumper
PERFORMANCE20-inch Hennessey 10-Spoke Wheels
0-60 mph: 3.2 seconds35-inch Off­-Road Tires
1/4 mile: 11.4 seconds @ 120 mphFront Leveling Kit
Hennessey & Mammoth Exterior Badges
UPGRADES TO STOCK TRXProfessional Installation
Upgraded High-Flow Supercharger System3 year / 36,000 Mile Limited Warranty
Supercharger Front Drive Pulley UpgradeInstalled $14,950
Supercharger Rear Drive Pulley Upgrade
Crank Damper Pin Assembly UpgradeMAMMOTH OFF-ROAD STAGE 2
Upgraded ThermostatMammoth Custom Front Bumper
Heavy Duty Supercharger BeltMammoth Custom Rear Bumper
Upgraded Spark PlugsLED Lights in Front Bumper
High-Flow Fuel Injectors20-inch Hennessey 10-Spoke Wheels
High-Flow Filtration System37-inch Off­-Road Tires
Crank Case Ventilation SystemFront Leveling Kit
HPE ECM Calibration UpgradeUpgraded Electronic Fold Out Steps
HPE TCM Calibration UpgradeHennessey & Mammoth Exterior Badges
All Necessary Gaskets & FluidsProfessional Installation
Professional Installation3 year / 36,000 Mile Limited Warranty
Chassis Dyno TestingInstalled $19,950
Road Testing (up to 200 miles)
Hennessey Embroidered HeadrestsOPTIONAL UPGRADES
Hennessey Exterior BadgeRetractable Electronic Bed Cover
Mammoth 1000 Exterior BadgesInstalled: $4,450
Serial Number PlaquesUpgraded Electronic Fold Out Steps
Limited Edition 1 of 200Installed: $3,450
2 Year / 24,000 Mile Warranty20-inch Hennessey Wheels &35-inch Off­-Road Tires
Installed $32,500Installed: $4,950

Package prices & contents subject to change. Contact Hennessey Performance for details.