2015 Roush Stage 3 Mustang Has 670 hp

Posted on May 9 2015 - 6:07am by Jeff Dunham

My last speeding ticket was nearly two years ago while behind the wheel of a 2014 Roush Stage 3 Mustang. Considering the supercharged 5.0-liter V8 produced 575 horsepower – the lowest of the Stage 3’s tunes – an encounter with the friendly folks at the Michigan State Police seemed inevitable. With the 2015 Stage 3 producing 95 more horsepower, if and when I drive the new supercharged ‘Stang, another meeting with Michigan’s finest seems likely.

2015 Roush

The combination of the Ford 5.0-liter V8 and a 2.3-liter TVS supercharger turns out 670 horsepower, which should have owners of the weightier Dodge Challenger Hellcat at least a bit nervous. All that power is complemented by 545 pound-feet of torque and what is almost certainly an ear-shattering exhaust note from the quad-tip pipes.

On top of the RS3’s trademark sound and speed, Roush has fitted the sixth-generation Mustang’s body with a new “R7” aero kit that actually looks toned down from last year’s car. 20-inch “Quicksilver” wheels are standard, although Roush is offering a pair of optional designs. Either way, Cooper RS3 tires are the rubber of choice.

Prices for the Roush Stage 3 Mustang start at $21,995, not including the $32,300 starting price of a Mustang GT donor car. Scroll down for the official press release.