Roush teases the 2012 RS3 Mustang with two videos at Laguna Seca

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Roush has released a few videos of the upcoming 2012 RS3 ‘Roush Stage 3’ Mustang cruising around Laguna Seca at open throttle for your enjoyment. Roush has been slow to release information about their latest creation that is rumored to have around 540 horsepower under the hood. From the videos, which don’t last very long we get a sense this is going to be one of the best Roush Mustangs of all time. Enjoy…