Hennessey is no stranger to taking some of America’s most popular pickup trucks and significantly increasing their performance. For its latest project, it developed a package for both the Chevrolet Silverado and GMC Sierra, and while not as insane as the 6×6 kits it sells for trucks like the Ram 1500 TRX and Ford F-150 Raptor, the upgrades are still noteworthy. The kit, known as the Goliath 650, is offered for the 6.2-liter L87 EcoTec3 V8 found in both the Silverado and Sierra. The Texas tuner starts by bolting a 3.0-liter supercharger to the V8 before supplementing it with a high-flow intake system, high-flow intercooler, and a crankcase ventilation system.
Hennessey has then fitted chromoly
pushrods, tweaked the engine software, and installed a stainless steel cat-back
exhaust that retains the original tips. The changes lift grunt to 650 horses
and 892 NM of torque. The engine and exhaust upgrades are available
for the Silverado RST, Trail Boss, LTZ, ZR2, and High Country models alongside
the GMC Sierra AT4 and Denali Ultimate. Those who own a Sierra AT4 can also opt
to have their truck equipped with a distinctive off-road package.
This package adds a custom steel front
bumper with laser-etched ‘Goliath’ lettering, an LED lightbar, additional LED
driving lights, 20-inch Hennessey wheels with 35-inch off-road tires, and a
suspension lift. Pricing details have not yet been released but, like all other
upgrades sold by Hennessey, the Goliath 650 package is backed by a 3-year /
36,000-mile warranty.
