The modern 5.2 liter Ford V8 engine certainly offers plenty of power but at the same time there is a lot of room for improvement. While the new Shelby GT350R Mustang comes from the factory with the decent 527 horsepower, Hennessey Performance claims that their HPE850 package will make your GT350 or GT350R more powerful than a GT500. To prove their statement team Hennessey takes a pair of identical Mustang GT350R's with one of them being stock and the other equipped with the HPE850 package to the Pennzoil Proving Grounds for some roll racing.
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Turn up the volume, hit the play button and enjoy the ride!
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