In the dynamic realm of high-performance pickup trucks, Hennessey Performance Engineering has once again asserted its dominance, introducing a compelling alternative for enthusiasts eagerly awaiting the resurgence of the Ram 1500 TRX. This new offering, the Mammoth 700, transforms the already robust Ram 1500 RHO into an even more formidable machine, delivering an impressive 700 horsepower. Beyond its raw power, the Mammoth 700 features an array of enhancements designed to elevate its off-road prowess and visual presence. This release is particularly timely, given the anticipated return of the V8-powered TRX, positioning Hennessey’s creation as an immediate solution for those seeking extreme performance in the interim.
Unleashing the Beast: Hennessey's Mammoth 700 RHO
On August 25, 2025, Hennessey Performance Engineering, based in Texas, officially unveiled its latest masterpiece, the Mammoth 700. This highly anticipated vehicle is a significantly re-engineered version of the 2025 Ram 1500 RHO, a model renowned for showcasing Stellantis's innovative Hurricane twin-turbocharged 3.0-liter inline-six engine. While the standard RHO's \"High Output\" configuration already delivers a respectable 540 horsepower, Hennessey's comprehensive modifications catapult this figure to an astounding 700 horsepower, matching the formidable output of the previous TRX.
This remarkable power surge is achieved through meticulous enhancements, including increased boost pressure, refined engine management software, and the integration of a new stainless steel exhaust system. Beyond raw power, the Mammoth 700 is equipped with an optional off-road package designed for the most challenging terrains. This package features a 2-inch suspension lift, a leveling kit, and massive 37-inch tires mounted on sleek 20-inch wheels, further amplifying the RHO's already impressive 11.8 inches of ground clearance.
Visually, the Mammoth 700 commands attention with a redesigned front bumper incorporating an integrated LED light bar, a revamped rear bumper, and distinctive Hennessey badging that proudly proclaims its enhanced status. To manage the immense power, Hennessey has also included a robust skid plate and high-performance brake pads and rotors, ensuring optimal safety and control for this high-octane machine. While the precise cost of these upgrades remains undisclosed, enthusiasts should anticipate a significant investment on top of the Ram 1500 RHO's approximately $70,000 base price, reflecting the premium performance and bespoke modifications offered by Hennessey.
A Glimpse into the Future of High-Performance Trucks
The introduction of the Hennessey Mammoth 700 at this pivotal moment prompts reflection on the evolving landscape of high-performance pickup trucks. With Stellantis CEO Antonio Filosa hinting at the eventual return of a V8-powered Ram TRX and the reintroduction of the naturally-aspirated 5.7-liter Hemi engine for the 2026 Ram 1500, Hennessey's offering serves as a potent reminder of the enduring demand for extreme power and capability in the truck segment. It underscores a fascinating dynamic in the automotive industry: while major manufacturers innovate with new engine technologies, specialist tuners like Hennessey continue to push the boundaries of existing platforms, catering to an insatiable appetite for unparalleled performance. This ongoing arms race promises an exciting future for truck enthusiasts, with more powerful and capable vehicles undoubtedly on the horizon.