Bambi already established max HP is 900 without E85 or methanol injection. How is Hennessey getting to 1000?
And there are no 2021 PCM available and no one has cracked it yet either. So how is Hennessey going to tune it.
Be very cautious. Law suites against Hennessey. Bad news. Never give all the money up front, if any, until truck is completed. Do your truck in little steps, one building on the next. These so called home runs usually end up very problematic.
All Ahmad Ali wanted was a Chevrolet Corvette souped up to have enough horsepower to defibrillate God. To realize this dream, the Qatari went to one of the most famous names in the car tuning business: John Hennessey. But three years later, he is still fighting Hennessey Performance Engineering...
jalopnik.com
Viper specialist John Hennessey is up to his cylinder heads in problems
www.autoweek.com
So you can see from the 2 quick links I looked up, this has been going on from 2002 to 2016. Go pull up public records from every state and you will be shocked at the number of BBB complaint and law suits.
In the viper club: Hennessey = con man Satan.
Buyer be ware.