During both our first drive and in our full review, we concluded that the 2010 Ford Mustang has raised the bar for modern day pony cars. The sculpted body, finely tuned suspension, higher quality interior and additional horsepower make it one of the best Stangs to ever come from the Blue Oval’s stable. With a flood of aftermarket variants sure to come, we couldn’t help but wonder if the new Mustang would provide an even better platform to work with, or if tuners might struggle to improve on an already excellent product. We now have the answer.

Roush, who were given inside access to the 2010 Mustang by Ford for their own product development, were first to market with their 427R Mustang that was unveiled back in March. We were lucky enough to be one of the first to get behind the wheel, and recently spent a full week with the 427R. Was Roush able to use their five years of experience with the S197 platform to capitalize on the upgrades and refinements made available in the 2010 Mustang? Read on to find out.