Hennessey's new "Goliath 650" package is looking to give Chevy and GMC pickup trucks a heck of a lot more horsepower than they came with stock. The new supercharger kit works on all standard 6.2-liter (L87 EcoTech3) GM V8 engines offered in the Chevy Silverado and GMC Sierra. From the factory, those V8-powered trucks make 420 horsepower and 460 lb-ft of torque, but Hennessey's kit bumps them up to 650 hp and 658 lb-ft.
What exactly does a 230-hp kit include? For starters, a 3.0-liter supercharger is accompanied by a high-flow intake, high-flow intercooler, a crankcase ventilation system, and chromoly pushrods. Hennessey's engine software calibration makes it all work harmoniously to pump out the nearly Corvette Z06 levels of power in a full-size pickup truck.
If you own a Sierra AT4, the off-road-oriented version of GMC's pickup, Hennessey also offers the Goliath Off-Road package. That comes with a new steel front bumper, an LED light bar, off-road suspension, 20-inch wheels, and 35-inch off-road tires. While there are off-road-ready versions of the Silverado too, only the Sierra AT4 gets the Goliath Off-Road package. However, the normal Goliath 650 kit is offered on all 6.2-liter V8 Silverado and Sierra models.
Hennessey didn't reveal any pricing just yet, nor did it say when this kit will be available, but all of the aforementioned upgrades come with a three-year, 36,000-mile warranty. To get either of the Goliath kits customers can send their existing trucks to or order the trucks with the kit from either authorized Chevy or GMC dealers or directly from Hennessey.
Depending on the cost, this could be a homerun upgrade for many GM truck owners. If anyone already owns an existing V8 Silverado or Sierra, this allows them to essentially upgrade to a performance version of their truck without having to trade it in for a new one. It's essentially an LT4 upgrade in a box.
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