I bought this Hypertech product for my 2013 Dodge Charger SRT8. I have to say it was easy to install as my mechanic friend installed it for me. It took him 10 minutes. I was a bit skeptical that this would work. But it works. I can immediately notice an increase in performance, the Chrysler/Dodge settings seem to be unlocked. As far as miles on gas go I haven't seen an improvement yet but I'm in Florida with a 95 degree heat so I turn the AC off and I'm sure when the weather gets cooler I'll see an improvement. I would recommend this product.
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