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John Hennessey Will Make You Drool Over 665-HP GMC Sierra

Tuning / 81 Comments

Everyone should have a supercharged full-size pickup truck in their life.

John Hennessey and crew do much more than add performance to sports cars. The Texas-based company also has a thing for full-size trucks and SUVs. But really, does anyone truly need a supercharged truck? Short and only answer: yes. And here to convince any potential fun suckers saying otherwise is Hennessey himself with the 665-hp 2015 GMC Sierra. The HPE650 Supercharged upgrade kit includes all of the typical Hennessey goodies like engine management calibration, custom camshaft, plus installation.

Then there's the 2.9-liter supercharger system itself. It gives the 6.2-liter V8 new life. Check out the video ahead showcasing this latest creation and if you're a tree-hugging hippie, then you're not wanted here. For everyone else, enjoy the video.

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