The three kits add sharpen the Mustang GT and add GT350 equipment.

The Shelby GT350 Mustang is a seriously impressive performance machine, but some customers might not want to spend $56,495 for the coupe. Maybe these people already have the current Mustang GT and don’t feel like trading it in. Ford Performance will soon offer three Power Packs that will give GT owners some of the Shelby’s parts for a lot less money. After the upgrades, the engines will still be emissions-legal in all 50 states, but using 91-octane fuel will be mandatory.

Available for the 2015-2017 Mustang GT, all three kits include software updates that enable no-lift shifting and better throttle response. Power Pack 1 arrives in August for $539.00 with the improved code and a K&N air filter. The upgrades bring the 5.0-liter V8 to 448 horsepower and 416 pound-feet of torque, which is 13 hp and 16 lb-ft more than stock. Power Pack 2 comes in September for $949 and includes the GT350’s cold air intake with an 87mm throttle body. The tweaks take the V8 to 456 hp and 424 lb-ft. Finally, Power Pack 3 surfaces in October for $2,395 and gives buyers both the Shelby’s cold air intake and its intake manifold. Ford Performance says the engine would make 472 hp and 405 lb-ft after the improvements.

These upgrades can’t give the Mustang GT the unique sound of the 5.2-liter V8 with a flat-plane crank in the Shelby GT350, but more power and better throttle response are always welcome improvements.

Source: Ford Performance via Road & Track

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Ford Performance Parts has announced emissions-legal performance calibrations for 2015-2017 Mustang GT. For the first time, calibrations are being offered with various levels of hardware to give customers more options and price points. 

Calibrations are North American Mustang spec ONLY at this time. 

Here are the features and unique content in all three kits:

Fits 2015-2017 Mustang GT
Features exclusive no-lift shift strategy and enhanced throttle response
Ford Performance calibrations feature exclusive Ford proprietary software and engineering
Ford Performance calibrations are 50 state legal with CARB EO
Calibrations available for manual and automatic transmission
Allows gear ratio changes up to 4.09:1
Automatic calibrations feature optimized performance shift schedule
Premium fuel, 91 octane or higher, is required

M-9603-M8 - Power Pack 1   (ETA: Aug 1, 2016)

Includes high flow K&N air filter 
13 hp and 16 lbs/ft peak gains over stock 
40lbs/ft gain at 1500rpm 

M-9603-M8A - Power Pack 2 (ETA: Sept  2016)

Includes GT350 cold air intake with 87mm throttle body and exclusive intake adapter (hardware available separately without calibration as part number M-9603-M50)
21 hp and 24 lbs/ft peak gains over stock 
40 lbs/ft gain at 1,500 rpm 
Industry exclusive open air filter with CARB EO

M-9452-M8 - Power Pack 3 (ETA:  October 2016)

Includes GT350 cold air intake with 87mm throttle body and  GT350 intake manifold M-9424-M52 
37hp and 5lbs/ft peak gains over stock  
60hp gain at 7500rpm 
Industry's only 50-state legal calibration with performance intake manifold 
Calibration Notes:

Ford Performance ProCal tool, included with all calibrations, requires laptop and internet access for calibration install

Powertrain calibrations are developed and supported for U.S. and Canadian vehicles

Federal and state laws prohibit any person from installing aftermarket add-on or modified parts prior to the sale of a new motor vehicle