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It’s a great time to be an American muscle car enthusiast.

The Hellcat has upped the standard for production horsepower, Chevrolet is about to release the sixth-gen. Camaro, and tuners are turning up the power on already-potent factory cars. Case in point: Roush Performance and its Stage 3 Mustang.

In case you missed it, Roush has officially announced its Stage 3 Mustang will make 670 horsepower and 545 ft.-lbs. of torque. This will be accomplished via its 2.3L TVS supercharged 5.0L V8. The package also features a quad-outlet exhaust, R7 aero kits, standard height adjustable performance suspension standard. Options included active dual-mode exhaust and three-way adjustable coil-over suspension.

According to Automobile Magazine, the 2015 Roush Stage 3 Mustang starts at $21,995 (not including the base price of the regular GT itself, of course).

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Author: David Fuller

David Fuller is OnAllCylinders' managing editor. During his 20-year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines. He has also partnered with mainstream and trade publications on a wide range of editorial projects. In 2012, he helped establish OnAllCylinders, where he enjoys covering all facets of hot rodding and racing.