The Hennessey H650 GMC Yukon is a supercharged version of the stock Yukon Denali that produces 650 horsepower and 658 lb-ft of torque, making it one of the most powerful SUVs on the market. The stock Yukon Denali comes with a 6.2L V8 engine that produces 420 horsepower and 460 lb-ft of torque. The Hennessey upgrade adds a supercharger, high-flow intercooler, high-flow air induction system, and other performance-enhancing components. The result is a significant increase in power and torque, which translates into improved acceleration, handling, and braking. The Hennessey H650 GMC Yukon is a great choice for anyone who wants a powerful and luxurious SUV. It offers the best of both worlds: performance and refinement.