TL;DR
Hennessey has introduced a modified GMC Sierra AT4 called the Goliath 700, featuring a supercharged 6.2-liter V8 that delivers 700 horsepower. The upgrade includes suspension, exterior, and interior enhancements, positioning it as a competitor to high-performance off-road trucks like the Raptor R.
Hennessey has revealed a modified version of the GMC Sierra AT4, dubbed the Goliath 700, featuring a supercharged 6.2-liter V8 producing 700 horsepower, making it a high-performance rival to the Ford Raptor R and Ram TRX.
The Goliath 700 upgrade replaces the Sierra AT4’s stock 3.0-liter turbo-diesel engine with a supercharged 6.2-liter V8, boosting output to 700 hp and 611 lb-ft of torque. The modifications include an air-to-water intercooler, stainless-steel catback exhaust, and suspension upgrades such as new upper control arms and DSSV shocks. Exterior enhancements comprise steel bumpers, a 40-inch LED light bar, off-road tires, and custom badging. Interior tweaks include all-weather mats and embroidered headrests. The package is backed by a three-year/36,000-mile warranty.
Why It Matters
This development matters because it offers a high-powered alternative to established off-road performance trucks like the Ford Raptor R and Ram TRX, filling a gap in the market for extreme, customized pickups. It also highlights Hennessey’s expanding portfolio of high-performance vehicles and modifiers, appealing to enthusiasts seeking both off-road capability and muscle car-like power.
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Background
GMC has not directly competed with the Raptor R or TRX in its stock lineup, leaving a niche for aftermarket tuners. Hennessey, known for building extreme vehicles like the Venom F5 hypercar, has now applied its expertise to the Sierra AT4, creating a custom, high-performance variant. The Goliath 700 is part of Hennessey’s broader strategy to produce bespoke, high-horsepower trucks for the enthusiast market.
“The Goliath 700 transforms the Sierra AT4 into a true muscle truck with unmatched off-road and on-road capabilities.”
— Hennessey Performance
“Hennessey’s Goliath 700 packs a supercharged V8 and aggressive styling, positioning it as a serious contender in the high-performance off-road segment.”
— Brad Anderson, Carscoops
high performance off-road tires for trucks
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What Remains Unclear
Details remain unclear about the full production run, pricing, and whether GMC will offer a factory version of this performance package. It is also not confirmed if other engine options will be available in the future.
supercharged V8 engine upgrade for trucks
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What’s Next
Hennessey plans to begin deliveries of the Goliath 700 later this year, with potential for further customization options and limited editions. GMC has not announced any official plans to produce a factory variant of this modified truck.
heavy-duty off-road bumper GMC Sierra
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Key Questions
How much does the Hennessey Goliath 700 cost?
The exact price has not been disclosed, but Hennessey packages typically start around $125,000, excluding the base vehicle price.
What is the performance of the Goliath 700?
The truck can accelerate from 0-60 mph in approximately 4.2 seconds, thanks to its 700-hp supercharged V8.
Will GMC offer a factory version of this upgrade?
There is no official confirmation from GMC about a factory version; the Goliath 700 is a custom Hennessey modification.
Is the Goliath 700 suitable for off-road use?
Yes, the vehicle features upgraded suspension, off-road tires, and rugged bumpers designed for challenging terrains.
Source: Carscoops
