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Hennessey Finally Turns the Ram RHO into the Raptor Fighter It Was Meant to Be

A sizable boost in power and some massive 37-inch tires make this 1500 Series an apex predator.

Front side view of a black and white RAM Mammoth pickup truck with large off-road tires, a heavy-duty black front bumper equipped with multiple LED lights, and a prominent RAM grille. The truck has a rugged, lifted stance suitable for off-road driving.Hennessey
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By Gray Van Dyke

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Stellantis CEO Antonio Filosa has confirmed the TRX will be rejoining the Ram lineup for 2026. However, until that day comes, the RHO continues to soldier on as the brand’s lone Ford Raptor fighter.

Assuming you can’t wait for the arrival of Ram’s new V8 supertruck, Hennessey Performance thankfully has you covered in the meantime.

Black RAM pickup truck with "Mammoth" and "Hennessey" branding, featuring off-road tires, a rugged front bumper with additional lights, and a hood scoop, parked on a paved surface at sunset.
Between its menacing color scheme and its massive tires, the Mammoth 700 is hardly lacking in presence.
Hennessey

With the launch of the 2025 Mammoth 700, the tuning outfit has turned the Ram 1500 RHO into a 700-horsepower monster that’s ready to challenge Ford for the role of apex predator.

Unleashing the hurricane

From the factory, Ram’s 1500 RHO is no slouch — the 3.0-liter twin-turbocharged inline-six Hurricane engine makes 540 horsepower and 521 lb-ft of torque. 

Never content to settle, however, Hennessey has increased the boost pressure, upgraded the engine management software and added a trick stainless steel exhaust system.

Black Hennessey Mammoth pickup truck with off-road tires, black alloy wheels, and tinted windows, parked on a paved surface with grass and a cloudy sky in the background.
Hennessey’s fold-out steps are essential upgrades, considering the lift and extra rubber.
Hennessey

As such, after thorough chassis calibration and testing on the dyno, the Mammoth 700 package takes the Ram RHO’s output to over 700 ponies. That’s on par with Ford’s 720-horsepower Raptor R.

To ensure each truck is up to snuff, Hennessey is prepared to conduct as many as 500 miles of road testing. However, keep in mind, the tuner is so confident in its efforts that each pickup comes backed by a three-year/36,000-mile warranty.

Rear view of a black RAM pickup truck with "Hennessey" and "Mammoth" badges on the tailgate, featuring illuminated red taillights, a rugged rear bumper, and large off-road tires, parked on a paved surface with a grassy field and cloudy sky in the background.
Hennessey’s bumper provides a subtle but refined upgrade over the stock unit.
Hennessey

A truly mammoth overhaul

Beyond the engine and intake tweaks, Hennessey has given the Ram RHO a laundry list of upgrades in line with its Mammoth 700 moniker.

So, along with a 3-inch lift, a suspension leveling kit and a set of 6-piston performance brakes, the pickup now touts components such as a custom skid plate, more aggressive front and rear bumpers and powered fold-out steps.

Front view of a black RAM truck with headlights on, featuring a prominent grille with "RAM" lettering, a hood scoop with amber lights, a rugged front bumper with additional round and bar LED lights, and large off-road tires. The windshield has a "Hennessey" decal. The truck is parked on a cracked pavement with a grassy field and cloudy sky in the background.
With a light bar, round lights and corner LEDs, the front bumper adds an abundance of auxiliary lighting.
Hennessey

As befits a towering supertruck, Hennessey has also given the Mammoth 700 an abundance of auxiliary lighting. The front bumper alone comes mounted with a 32-inch LED light bar, a pair of 5-inch round lights and a set of corner-positioned LEDs. 

Riding on a set of 20-inch Hennessey custom wheels wrapped in Raptor-matching 37-inch tires, the Mammoth 700 is made only better by features like its high-temp brake pads and high-performance rotors, among other upgrades.

Black RAM Mammoth pickup truck with Hennessey branding, featuring large off-road tires and a lifted suspension, parked on a paved surface with grass in the foreground and a cloudy sky at sunset in the background.
The Mammoth 700 proves Ram’s Hurricane inline-six can be made to produce some big power numbers.
Hennessey

Available for inquiry

As of this writing, Hennessey’s Mammoth 700 package for the Ram 1500 RHO is open for orders.

While the brand has not provided exact pricing estimates, it’s worth noting that you’re responsible for the donor vehicle. MSRP for a 2026 Ram 1500 RHO runs just shy of $70,000.

If you’re interested in commissioning a build for yourself, you can reach out through the inquiry form on the Hennessey website.

About the Author: Gray is an associate editor at Gear Patrol, covering cars, motorcycles and anything else with wheels. When he’s not chasing the latest industry news, he’s probably wrenching on one of many projects. For better or worse, he believes classics make perfectly practical daily drivers.

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