We already know that the 2015 Ford Mustang will debut with an all-new, four-wheel independent suspension and upgraded brakes, and we even know how much it will weigh, but details are emerging on the optional Performance packages that will give the new pony a little extra kick. There are two Performance packages: one for the EcoBoost fastback/coupe (or convertible) and one for the GT fastback/coupe.
The Performance packages are essentially Track packs with a new name; they’ll come with specific springs, unique bushings, and monotube rear dampers, along with additional engine-cooling capacity, a thicker rear anti-roll bar, a K-brace under the hood to tie the strut towers to the bulkhead, and a center gauge pack. In addition, there are different calibrations for the ABS, stability control, and electric-assisted power steering.
From there, the EcoBoost model’s Performance pack ($1995) will feature four-piston, aluminum fixed-caliper brakes with 13.9-inch rotors up front, and single-piston, iron floating calipers in the rear with 13.9-inch rotors. It will feature a 3.55:1 axle ratio, and will ride on Pirelli 255/40R19 Y-speed-rated tires front and rear mounted on 19.0- x 9.0-inch aluminum wheels finished in Ebony black.
The GT’s Performance pack ($2495) takes things up a notch: The front brakes are six-piston Brembos with fixed aluminum calipers clamping 15.0-inch rotors (the same as the 2014 Shelby GT500); the rear brakes are shared with the EcoBoost Performance pack. The final-drive ratio is 3.73:1 and a Torsen differential is specified. Up front, it wears the same 255/40R19 Y-speed Pirellis and 19- x 9-inch Ebony black wheels from the EcoBoost’s Performance pack, but at the rear the GT version wears even beefier 275/40R19 Pirelli shoes on 19.0- x 9.5-inch wheels. A strut-tower brace and a unique front splitter, which directs cooling air to the brakes, complete the package.
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Ford claims that a 2015 Mustang GT with the Performance pack consistently beats the lap times of the 2012–2013 Boss 302 in track testing; that sounds like one test we’ll have to try for ourselves.
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