Roush to offer 700 horsepower kit for Mustang

Ford tuner Roush has put together three new kits for Mustang GT500, offering as much as 700 horsepower for owners of the popular muscle car. The simplest upgrade is the addition of a Cold Air Kit with new calibration which nets 45 horsepower.

The next step is including the 2.3L blower in a package which adds 120 horsepower and 88 lb.-ft. torque while keeping a 3-year/36,000 mile warranty. This warranty will not void any offered by the factory. This kit includes the ROUSHcharger, a 78mm non-removable pulley and new calibration.

For those living on the wild side, a non-warranty version will also be offered, and this version is anticipated to push the GT500 engine to 700 horsepower -- 200 more than the stock engine. Customers will have to purchase a 72mm or 76mm pulley separately, and this version does not include an upgraded calibration. Pricing has not yet been announced.