Ford Performance has just announced a new power upgrade kit for 2015 and newer Ecoboost Mustangs. Like the power packs announced for the Mustang GT back in late July, the upgrade for the four-cylinder pony car will be covered under the factory warranty, and 50-state legal.

According to Ford, the Performance Calibration Kit will give 2.3-liter turbocharged Mustangs an increase of 25 horsepower, to 335, and a whopping 70 lb.-ft. increase of torque, to 390 lb.-ft. That's pretty good for what's basically an ECU tune.

Ford also says the new tune drastically improves the EcoBoost's power curve, increasing power output by 100 horses at 6000 rpm. The Ecoboost Mustang was already a good car, but with this upgrade, it sounds like it could be a seriously fast machine.

The kits are available now on Ford's performance parts website, or through dealerships that stock Ford Performance parts. More 50-state-legal turbo power without voiding the factory warranty? Sounds like a win-win to us.

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