The GMC Sierra’s V8 has decent power, but Hennessey Performance felt that it had more potential, leading to the introduction of the Goliath 650 upgrade kit. This modification alters the stock powertrain and pushes it to the limits.
Hennessey Performance GMC Sierra Review
The GMC Sierra ranks high on the list of most aggressive-looking pickup trucks. But with all its combative looks, it barely matches up to most performance-oriented trucks. With this in mind, Hennessey Performance developed the Goliath 650 upgrade kit for several trucks and for the Sierra, it results in a 55% increase in horsepower and a 43% increase in torque compared to the stock power output. This makes the Hennessey GMC Sierra one hell of a truck, and if you’re curious about how much power it has, we will cover that next.
Should A Truck Be This Quick?
Without the Hennessey Treatment, the GMC Sierra’s 6.2-liter V8 makes 420 horsepower and 460 lb-ft of torque, which, when mated to a 10-speed auto transmission, pushes the truck from 0-60 mph in roughly 5.4 seconds. The Goliath 650 upgrade kit enhances its powertrain with a 3.0-liter supercharger, high-flow intake system, high-flow intercooler, a crankcase ventilation system, chromoly pushrods, and a stainless-steel cat-back exhaust system to tweak it to make 650 hp and 658 lb-ft of torque. This super boost accelerates the Goliath 650 GMC Sierra from 0-60 mph in 4.3 seconds, 1.1 seconds faster than the standard Sierra, but its top speed remains at 112 mph.
Upgrades Made Upon Request
Unless you request upgrades to the interior, Hennessey Performance doesn’t modify GMC Sierra’s cabin layout and design with the Goliath 650 upgrade kit. GM offers this pickup truck in various trim levels, including the Denali, SLE, Pro, AT4, and AT4X. All trim levels have relatively similar interior designs, with subtle differences influencing comfort and price. But overall, the Goliath 650 GMC Sierra will maintain the interior design of the Sierra on which it’s based. While GM builds these trucks for rugged terrains, they still equip them with comfortable seats for passengers, whether it's the regular, double, or crew cab configuration.
It’s Still A Sierra
Hennessey knows that the GMC Sierra 1500 lineup of pickup trucks is among the most rugged and aggressive full-size trucks. Therefore, they don’t have to modify anything to prove a point unless you want them to. Still, the Goliath 650 GMC Sierra rolls off the production line with subtle markers that Hennessey modifies. These include a Hennessey logo on the truck bed. While we can’t guarantee it, you can get complimentary wheels and brake pad upgrades with the Goliath 650 kit.
GM Does It Best
GM does a great job of equipping the GMC Sierra with the latest, most relevant technology features, which means Hennessey does not have to upgrade these. It could be argued that the Goliath 650 is a tech upgrade, but when talking about tech, in this case, we’re referring to the infotainment system and driver assist features. The Goliath 650 upgrade kit is meant for Sierra from 2022 and later. Most GMC Sierra 1500, including the AT4 and AT4X from that model year, have infotainment features such as CarPlay and Android Auto compatibility, Bluetooth, and navigation. Other features include an in-vehicle trailering App, GMC Pro Safety, and tons of sensors and cameras.
Upgrade Or Order Custom
Hennessey Performance offers the Goliath 650 upgrade kit for GMC Sierra at $27,950 without including the truck's starting MSRP. This means you can take your Sierra for modification or order a customized one from them. However, if you want to skip these processes, we have a few GMC pickup trucks, including Sierras, in our listings.
Final Thoughts
Aftermarket tuners like Hennessey Performance are highly skilled at enhancing stock powertrain and drivetrain components to unlock a car's full potential. With the Goliath 650 upgrade kit, your GMC Sierra will have more power to venture into the wild and keep up with the traffic on a busy highway. Exotic Car Trader creates an exclusive and safe way of buying and selling cars, eliminating the daunting experiences of private selling for buyers and sellers. Every vehicle listed on Exotic Car Trader goes through a private seller verification process, ensuring legitimacy for our buyers. Also, Exotic Car Trader's car buying process is well outlined, with all fees and packages providing our buyers with a seamless and inclusive experience. We can handle the escrow of funds at no additional cost to the buyer and seller, and we also provide trade-in and financing options for buyers. For transaction safety, our Transactions Team is world-class and equipped with industry fraud detection tools to ensure a safe and secure transaction. These are just some of the benefits you enjoy when buying or selling on Exotic Car Trader. Contact us for listing services or to buy a car on Exotic Car Trader today.
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