Texas-based tuners Hennessey Performance are back with another piece of pure pickup truck insanity. This time, the Goliath 6x6 package upgrades a base Chevy Silverado Trail Boss Z71 with power and drivetrain components that best even its Ford-based VelociRaptor stablemate.
Much like its VelociRaptor predecessor, the Goliath brings a stunning 6x6 layout to the market, with two rear axles in place of the more standard dually layout. Much of the Goliath's exterior remains relatively unchanged in terms of outright design aesthetic, as Hennessey has chosen simply to extend the rear fender flares and truck bed rather than introduced unique body panel lines of their own.
Of course, as if the truck's size alone weren't enough to make it obviously a Hennessey creation, massive lettering across the front grille has replaced the original Silverado's Chevrolet logo. Other exterior changes include custom Hennessey 20-inch wheels shod in BFG 37-inch off-road tires, which combined with an eight-inch lift helps to maintain the proportions of the underlying Silverado rather than making it look simply stretched out at the rear.
Hennessey also throws on a rollbar on the extended truck bed, an LED light bar above the cabin, and quad exhaust tips integrated into a Hennessey-specific rear bumper. The specific Silverado Trail Boss Z71 model comes with the otherwise off-road specific details like tow hooks as well as black fenders and trim details.
Drivetrain & Mechanicals
The critical element that makes the Goliath so insane is that its 6x6 conversion isn't just for show. Those extra wheels at the rear are powered via an additional axle, though in typical Hennessey form, the first step in the build, or as Hennessey puts it "the first order of business is adding more power" via the HPE700 Supercharged package.
The Silverado's factory 6.2-liter V8 with Dynamic Fuel Management, which cranked out 420 horsepower and 460 lb-ft of torque, has received a 2.9-liter supercharger system that's alone larger than most commuter cars' entire engine. Pushing 7 psi of boost, the supercharger is paired to stainless steel exhaust and can crank out up to 705 horses and 675 lb-ft. Those figures allow Hennessey to boast of a potential 0-60 time somewhere in the mid-four second range for the truck, which should weigh in well over 5,000 pounds.
Of course, with Hennessey more is always better, and a stroker motor upgrade is also available that can up power output to as high as 808 horsepower. Hennessey makes no mention of whether the Silverado Trail Boss Z71's 10-speed automatic transmission receives an upgrade, but other offerings from the company as well as the Goliath's three-year/36,000-mile warranty point to confidence that all that grunt will be well-handled.
Complementing the engine upgrades and additional rear axle, Hennessey has added an entirely new rear suspension system, and the new wheels come with a full brake setup—a Brembo brake system upgrade is also on the options checklist.
Interior & Tech
Hennessey mentions custom interior upgrades for the Goliath, though details are scant on exactly how in-depth customers can go to make their extra-special pickup even more unique. Tech has figured into the Silverado in a big way for 2019, as Chevy tries to improve on fuel economy with a series of six engines, the larger two of which feature an industry-first Dynamic Fuel Management system with 17 discreet cylinder modes and auto start/stop standard.
Hennessey presumably has only increased the trailering capacity of the base Silverado, already rated at 7,300 to 7,400 pounds. Chevy's optional Advanced Trailering Package includes a hitch guidance, hitch view, automatic electric parking brake assist, and hitch area lighting. The Trailering Camera Package, meanwhile, includes sideview cameras and an additional port for an accessory camera.
The Z71 package comes with locking rear differential and Rancho shocks, as well as the stylish skid plates which are all the more important given the Goliath's increased ride height. Other important additions to the Silverado lineup that should translate to the Goliath include an electric tailgate, removable tie downs (12 permanent and nine removable), and a 23% increase in bed size.
Pricing & Buying
Hennessey has reported that the base price for a Goliath 6x6 will be $375,000, which thankfully includes the price of the factory 2019 Chevy Silverado Trail Boss Z71. The 808-hp stroker upgrade, Brembo brakes, and interior customization will only add to that sticker price. Only 24 Goliaths are slated for production, and would-be buyers can contact Hennessey directly or learn more at select Chevrolet dealers.
The only real competition for the Goliath 6x6 comes in the form of another Hennessey monster, the Ford F-150 Raptor-based VelociRaptor 6x6. The main difference between the two, other than stylistic cues from the underlying trucks, is a twin-turbocharger upgrade on the Ford rather than the Chevy's supercharger. Pricing is almost comparable, with the VelociRaptor 6x6 starting at $349,000 including the factory Raptor.