If You're Utterly Mad And Want More Power From Your Hellcat, The Hennessey HPE850 Kit Is What You Want

Here's a Hennessey-tuned Charger SRT Hellcat making some lovely V8 noise as it's given a dyno run. Standard car's 639RWHP not enough? This one makes 741
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The extra power is all thanks to a plethora of modifications including a new ECU, a lower supercharger pulley upgrade plus a ported supercharger housing, and a new air filter element. Oh, and it also comes with a set of Hennessey embroidered headrests, although these might not add any more power.

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