Right out of the box, the GMC Sierra 1500 is a very solid truck, but if you’ve got a speed itch, the stock pickup may prove lacking. Enter Hennessey Performance Engineering, which offers a wide variety of go-fast upgrades for various GM vehicles, including the Goliath 650 upgrade for the light-duty GMC Sierra. Now, we’re watching as a supercharged Hennessey Goliath 650 GMC Sierra demolishes a stock Sierra 1500 in the following video.
First things first, let’s talk about the Hennessey Goliath 650 upgrade. Available for factory GMC Sierra 1500 and Chevy Silverado 1500 pickups equipped with the naturally aspirated 6.2L V8 L87 gasoline engine, this package yields a 55-percent increase in horsepower and 43-percent increase in torque over the stock specs of 420 horsepower and 460 pound-feet of torque.
Making those figures possible is a 3.0L supercharger system complemented by a high-flow intake, high-flow intercooler, chromoly pushrods, and stainless-steel cat-back exhaust system, as well as a crankcase ventilation system and Hennessey’s engine management system. Put it all together, and you get a dyno-verified 650 horsepower and 658 pound-feet of torque – enough to totally transform the GMC Sierra 1500.
Of course numbers on a page are one thing, but what do those numbers look like in action? Luckily, the following video shows us exactly what an extra 230 horsepower and 198 pound-feet of torque looks like on the drag strip. Clocking in at a little over two-and-a-half minutes, the video is simple and straight to the point, showing us a heads-up drag race between a stock truck and a Sierra with the Hennessey Goliath 650.
Check it out right here:
Notably, Hennessey also offers the Goliath Off-Road package for the GMC Sierra AT4, which includes a custom steel front bumper, LED light bar, LED driving lights, a chassis lift via off-road suspension, 20-inch wheels, and 35-inch tires.
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Comments
GM should offer one of these from factory. Call it an SS and Syclone
nice read