I say eff the 5.0, get a Boss 
0-60 in 4 flat, quarter mile in 12.3, watch the video on this page and look at the Laguna Seca lap times, R8=Owned.
2012 Ford Mustang Boss 302 Suspension, Brakes, and Tires - Motor Trend
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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