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Although it's a huge motor at over 500ci,675hp is very impressive for a N/A motor.I think you're gonna need some more parts Rog!!!
Nah, i dont think so. Ive never been impressed with Vipers, even the Hennessey Vipers. Dont get me wrong, i like them and would own over a good deal of vehicles if money wasnt really a problem, but 500hp out of 8.3L? 500hp out of 7.0L sounds better, and 550hp to the ground out of 5.4L sounds even better than that. These are heavy, inefficient motors IMO. But this thing is gonna be a killing machine.
When it's all said and done , who cares about how the powers achieved, as long as its there.....If your buying a Viper I hardly think your gonna spend time traveling all over town trying to find the cheapest gas...