Hennessey & FOX Factory Collaborate to Create Limited Edition MAMMOTH 400 Ram Truck
Sealy, Texas (July 2, 2024) – Hennessey, renowned for its high-performance hypercars, has teamed up with FOX Factory to introduce a limited edition of the 2024 RAM 1500 sport trucks, named the MAMMOTH 400. This exclusive model will mark the final appearance of the iconic HEMI engine in a 5.7-liter V8 Ram 1500 Laramie, featuring extensive exterior modifications that highlight both aesthetics and performance.
The MAMMOTH 400 is available in three striking color options: Viper Red, Viper White, and GTS Blue, each adorned with classic full-length twin ‘Viper Stripes.’ This design pays homage to Hennessey’s early connection with the Dodge SRT Viper community, evoking a sense of heritage and legacy.
To enhance the vehicle’s handling and appearance, the MAMMOTH 400 is equipped with a premium FOX and Ridetech suspension system that lowers the center of gravity. The performance exhaust, complete with carbon fiber tips, amplifies the powerful growl of the V8 engine. The truck’s aggressive aesthetic is further accentuated by a custom body kit, featuring side skirts, a bespoke front bumper, and a carbon fiber splitter. Customers can also choose between 22-inch wheels in satin black or gloss black milled dark tint to personalize their truck’s look.

John Hennessey, Founder and CEO of Hennessey, expressed his excitement about the collaboration: “We are thrilled to partner with FOX to build a special sport truck with a uniquely American livery for the final HEMI V8-powered Ram trucks. Our MAMMOTH 400 Ram celebrates American independence with patriotic colors combined with the ‘fireworks’ that only the HEMI V8 engine can deliver!”
Mike Dennison, CEO of FOX Factory, shared similar enthusiasm: “In our pursuit to constantly raise the bar on performance in both on-road and off-road premium vehicles, we are delighted to collaborate with Hennessey Performance. This partnership resonates deeply with automotive enthusiasts, as both companies are dedicated to excellence, next-level performance, and cutting-edge innovation.”
The color options for the MAMMOTH 400 connect to Hennessey’s rich history and patriotically reference the American flag’s colors. Echoing the Dodge Vipers built by Hennessey in the late 1990s and early 2000s, the sport truck embodies the visual and performance characteristics of this iconic American supercar. The MAMMOTH 400 is available in GTS Blue with white stripes, Viper Red with white stripes, and Viper White with blue stripes.
With a production limit of only 250 units globally for 2024, each MAMMOTH 400 truck will feature signature Hennessey badging and a serial-numbered engine plaque. These trucks are available exclusively through authorized Chrysler, Dodge, Jeep, or Ram dealers, and come with Hennessey’s 3-year / 36,000-mile limited warranty. Interested customers can learn more and place their orders through authorized dealers, at HennesseyPerformance.com/Mammoth-400, or by calling +1 205.421.3453.
















