MuscleCar Tuner Showdown: HPE650/SuperSnake/SpeedfactorySRT8

We've compared nearly every combination of modern American muscle cars on the market. Now it's time for the ultimate showdown - Hennessey's Camaro HPE650 vs Shelby's GT500 Super Snake vs Speedfactory's Challenger SRT8. We head to the dyno, the test track and the racetrack to determine which of these tuned pony cars reigns supreme. Read the story here: http://www.motortrend.com/roadtests/coupes/112_0912_hennessey_camaro_speedfactory_challenger_shelby_gt500_comparison/index.html