We miss proper road-focused sport trucks. We’re talking about things like the GMC Syclone from the early 1990s and the Ford F-150 SVT Lightning and Dodge Ram SRT-10 from the 2000s. Recent trends have seen manufacturers and tuners sticking chunky tires and lift kits on everything to satisfy the overlanding craze, but there’s surely space for some slammed suspension and deep body kits, too?
Hennessey clearly thinks so, because it has partnered with Fox Factory to produce the limited-run Mammoth 400. Just look at those racing stripes and that burnout picture. Heck yeah.
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The Mammoth 400 has been produced to celebrate the end of the 5.7-liter HEMI V8, with Ram dropping the iconic engine after 2024. Interestingly for Hennessey though, it has left the engine well alone meaning you get the same 390hp and 555Nm of torque as the standard truck. Can someone check whether any pigs have started to sprout wings?
What you get instead is a very fancy suspension setup with Fox shocks and RideTech lowering springs to improve handling, plus a new Borla sports exhaust with carbon-fiber tips to allow that HEMI to properly clear its lungs.

There’s the full body kit too with new bumpers, side skirts, and splitters, while the wheels are 22in and can be painted satin or gloss black. The rest of the exterior paint “celebrates American independence with patriotic colors,” says John Hennessey himself. We’re loving the nods to the Dodge Viper too.
Just 250 Mammoth 400s will be available in 2024 and each will feature a numbered engine plaque and ‘signature Hennessey badging.’ Time for sport trucks to make a comeback?
More photos of the Hennessey Mammoth 400:

















NOTE: This article first appeared on TopGear.com. Minor edits have been made.