Hennessey Steps Up with a Mammoth RHO While TRX Fans Wait
As a truck enthusiast who’s been counting the days for the Ram 1500 TRX’s V8 comeback, I was pleasantly surprised by a report just 9 hours ago at 1:47 AM IST on August 27, 2025. Hennessey Performance is offering a compelling alternative with the Hennessey Mammoth Ram 1500 RHO, turning the current Hurricane inline-six into a 700 HP beast. Unveiled to bridge the gap until the TRX returns, this 2025 Ram 1500 RHO upgrade showcases Hennessey’s knack for transforming pickups. Let’s dive into its power, rugged design, and how it stacks up against the wait for a new TRX.
Unleashing Power: The Hurricane Gets a Boost
The heart of the Mammoth is the Ram 1500 RHO’s twin-turbo 3.0-liter Hurricane inline-six, which starts at 540 horsepower and 521 lb-ft of torque in its high-output form. Hennessey cranks it up to 700 horsepower with a mix of increased boost pressure, a custom stainless-steel exhaust, and proprietary engine mapping software fine-tuned in-house. This upgrade keeps the truck’s drivability intact while adding serious muscle, making it a standout in the 2025 Ram 1500 RHO lineup. Each unit undergoes rigorous dyno testing at Hennessey’s Sealy, Texas HQ, followed by real-world trials at the Pennzoil Proving Grounds.
Rugged Redesign: Built for Adventure
The Mammoth’s exterior is a rugged overhaul. It swaps the stock 18-inch wheels and 35-inch tires for 20-inch custom alloys wrapped in 37-inch off-road tires, lifting the truck by three inches with a front and rear suspension leveling kit. The new front bumper packs a 32-inch LED light bar, two 5-inch round lights, and two 3-inch corner lights, retaining factory parking sensors for practicality. A matching rear bumper with integrated lighting and space for a full-size spare tire adds versatility. Powered fold-out step bars ease access, while an optional six-piston brake kit with high-temp pads and performance rotors ensures stopping power on any terrain.
Inside, the cabin features black leather with bold orange stitching across the seats, dashboard, and steering wheel, complemented by branded floor mats. A metallic shield on the lower center console hints at added durability, rounding out a cockpit ready for both work and play.
Tech and Craftsmanship: Hennessey’s Signature Touch
Hennessey’s expertise shines through with every detail. The Hurricane engine upgrade leverages advanced tuning to maximize output without compromising reliability, a testament to the team’s experience with muscle cars and trucks alike. The dyno and proving ground testing ensure each Mammoth meets high standards, while the inclusion of all necessary gaskets, fluids, and hardware—backed by a three-year/36,000-mile warranty—offers peace of mind. This craftsmanship echoes Hennessey’s legacy, making the Mammoth a refined yet wild upgrade.
Value and Timing: A Smart Move
Pricing isn’t public, but with the base RHO starting around $70,000, the Mammoth could add $20,000-$30,000, depending on options. This timing is perfect, launching before the TRX’s anticipated 2026 return with its Hellcat V8. For those unwilling to wait, the Mammoth delivers immediate power and off-road prowess, potentially holding value as a limited-run model.
Comparison: Mammoth vs. the TRX Dream
The Mammoth outshines the current RHO and rivals the TRX’s 702 horsepower with its 700 HP output. While the TRX offers V8 charisma, the Mammoth’s inline-six tuning and off-road upgrades provide a unique edge. Without a 6×6 conversion, it focuses on subtle enhancement, ideal for enthusiasts seeking a balance of performance and practicality until the TRX roars back. (Image Source- caranddriver.com)
My Take: A Worthy Stopgap
As of August 27, 2025, the Hennessey Mammoth Ram 1500 RHO is a thrilling TRX alternative that doesn’t disappoint. Its power, rugged upgrades, and timely release have me intrigued—will you hold out for the TRX or jump on this Mammoth now?
