A Roush-tuned Ford Mustang is a modern muscle car gone manic. Our own Drew Phillips recently got to spend time with the 540-horsepower 2012 Roush RS3, which straddles the performance line between ...

Both the Roush Stage 3 with its Phase 3 package and Ford's factory Shelby GT500 even crest the 650-horsepower mark, with 675 and 662 ponies, respectively. Naturally, someone needed to find out ...