Blake W.
I experienced nothing but…
I experienced nothing but professionalism and quality sending my Hellcat to them. I’d do it all over again. Highly recommended Hennessey.

Hennessey® Performance was founded more than 35 years ago and has been focused on pioneering automotive performance ever since.John Hennessey, our founder and CEO, made a name for himself in the early 1990s with race-winning vehicle modifications that gained global fame. Pursuing his true passion, John left his small environmental business and aimed his entrepreneurial skills at modifying, tuning, and enhancing high performance cars and trucks. Today, the company operates Hennessey® Performance Engineering (HPE), Hennessey® Special Vehicles (HSV), and the world-famous Tuner School® where future vehicle engineers and tuners learn the trade. Hennessey® has modified more than 15,000 cars and trucks since opening in 1991.
Hennessey Performance (hennesseyperformance.com) has 3 customer reviews on Five Star Index, with an average rating of 2.3 out of 5.
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3 approved reviews, newest moderated first
Blake W.
I experienced nothing but professionalism and quality sending my Hellcat to them. I’d do it all over again. Highly recommended Hennessey.
Hugo C.
Don't ever send your precious car to them There are 100s of other tuners to be dealing with the low quality , bad service employees out there.
Matthew L.
This company is garbage they build awesome cars but they will put You in danger go with another company . They removed my windshield wiper reservoir didn’t. Even tell us and I got into accident because of it ! And they lied more then scut Lawyers