These days, the high-performance SUV segment just seems to be getting crazier by the minute, with power numbers and acceleration figures once thought to be exclusive to sports cars now the norm. The new Cadillac Escalade-V is certainly a good example of this, but now, Hennessey Performance is serving what could be a healthy rival in the form of the new H650 GMC Yukon Denali. Now, we’re watching this supercharged monster pound around Hennessey’s test track in the following brief video.
If you’ve been under a rock for the last several decades, Hennessey Performance Engineering specializes in modifying and tuning vehicles for more speed and more power. Based out of Texas, Hennessey dabbles in a broad variety of different makes and models, including a wealth of GM products.
Now, Hennessey is turning its wrenches towards the GMC Yukon Denali, adding a 3.0L blower on top of the factory 6.2L V8 L87 gasoline engine for a serious boost to horsepower and torque. Paired with a high-flow intercooler, high-flow intake, chromoly hardened pushrods, a new crankcase ventilation system, stainless steel exhaust, and in-house engine management calibration, the new HPE650 package brings the L87 up to a claimed 650 horsepower at 5,500 rpm and 658 pound-feet of torque at 4,200 rpm. Not too shabby considering the standard spec is rated at 420 horsepower and 460 pound-feet of torque.
The package includes all the necessary gaskets, fluids, hardware, dyno testing, and related bits and pieces, as well as a serial-numbered engine plaque and unique exterior badging. The package even includes a three-year / 36,000-mile limited warranty. An upgraded performance wheel and brake combo is optional. The HPE650 upgrade can also be applied to the extended-length GMC Yukon XL.
It’s a tempting bit of kit, and should deliver some pretty wild fun behind the wheel. That much seems evident from the short, sub-two-minute video featuring a Hennessey-tuned GMC Yukon Denali, as seen below: