Sealy, TX - 12.12.2023

Supercharged GMC Sierra AT4 // Goliath 650 Upgrade by Hennessey

Hennessey’s ‘Goliath 650’ Supercharged Upgrade for 6.2L V8 GMC Sierra and Chevrolet Silverado!

Hold on tight, truck enthusiasts! We have pushed the limits once again with the latest powerhouse creation – the ‘Goliath 650’. This mind-blowing upgrade transforms the already rugged GMC Sierra AT4 into a roaring beast with an astonishing 650 horsepower and 658 lb-ft of torque.

Key Performance Specs:

  • 650 bhp @ 5,500 rpm
  • 658 lb-ft torque @ 4,200 rpm
  • 3.0 Liter Supercharger System
  • High-Flow Intercooling System
  • High-Flow Air Induction System
  • Chromoly Hardened Pushrods
  • Crankcase Ventilation System
  • Stainless Steel Catback Exhaust System
  • HPE Engine Management Calibration


But the upgrades don’t stop there! Hennessey’s meticulous attention to detail extends to every aspect of the Goliath 650 package:

Complete Package Includes:

  • All Necessary Gaskets, Fluids & Hardware Professional Installation
  • Chassis Dyno Testing
  • Road Testing (Up To 500 Miles)
  • Serial-Numbered Engine Plaque
  • Hennessey & GOLIATH Exterior Badging
  • 3 Year / 36,000 Mile Warranty


Dominating Exterior Upgrades:

  • GOLIATH Custom Front Bumper
  • GOLIATH Custom Rear Bumper
  • LED Lights in Front Bumper
  • 20” Hennessey 10-Spoke Wheels
  • 35” Off-Road Tires
  • Off-Road Suspension Upgrade


Discover the thrill of raw power and unparalleled performance as we take this AT4 Sierra through its paces. From the distinctive roar of the engine to the custom exterior enhancements, the ‘Goliath 650’ is a true testament to Hennessey’s commitment to pushing the boundaries of automotive excellence.




Talk to a Representative


Stay up to date


Supercharge your career