• GMC Denali By Hennessey Goes From 0 To 60 mph In 4.5 Seconds: Video

Leave it to John Hennessey to throw a supercharger and a tune on every V-8-powered GM vehicle. Take this 2015 GMC Yukon Denali. It’s 6.2-liter EcoTec3 V-8 is fitted with Hennessey’s HPE650 Supercharger kit that brings the engine’s output rating to — like the name suggests — 650 horsepower.

The blower is a 2.9-liter unit that is cooled by a high-flow intercooler system, while a set of high-flow cylinder heads help the engine breath. A new camshaft makes adjusts the valves’ operation, adding not only more horses but also a respectable rumble. Lastly Hennessey flashes the Yukon’s ECU with a custom tune. Best of all, the whole deal comes with a 3-year/36,000-mile warranty.

The 650 horsepower and 658 pound-feet of torque is a marked improvement from the engine’s stock 420 horses and 460 pound-feet. That helps the heavy, six-passenger SUV to hit 60 mph in just 4.5 seconds. That’s as fast as a 2015 Mustang GT. The Denali continues rocketing down the strip, finishing the quarter mile in 13.1 seconds at 110 mph. Again, that’s darn close to the Mustang’s 13.0-second, 113-mph run.

Want this sort of power in your new $63,000 mall crawler? Sure you do. All it takes is money. Expect to play close to $20,000 for the HPE650 package.

GMC Denali

2015 GMC Yukon Denali High Resolution Exterior
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The GMC Yukon Denali is all-new for 2015, with mirrored updates from the 2014 updates on the pickup truck lineup. The Denali is GMC’s most luxurious trim level, boasting levels of lux only bested by the Cadillac Escalade. The interior is trimmed with beautiful wood grain and supple leather.

Under the hood is GM’s new 6.2-liter, EcoTec3 V-8. Besides a few bolt-on bits, this is the same engine found in the new Corvette Stingray. The engine uses direct fuel injection, variable valve timing, and Active Fuel Management in order to squeeze the most power and efficiency out of the small block V-8.

Pricing for the Yukon Denali starts at $63,770, but can easily exceed the $70,000 mark with some added options.

Mark McNabb
Mark McNabb was a contributor at TopSpeed from 2013 to 2018. Growing up, Mark always had a mind for tinkering on random items throughout his home and dad’s garage, including a 1953 Ford Mainline and 1971 Corvette Stingray.  Read full bio
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