Video: Arrington & Holley Tune Up 2015 Hellcat Engine To 773 HP

Video: Arrington & Holley Tune Up 2015 Hellcat Engine To 773 HP

The Dodge Hellcat's Hemi is the most powerful engine in the company's arsenal. Holley and Arrington have figured out the details to using standalone engine tuning, and in the process pump out big power on the dyno.

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