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  (D-598-19) 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  Calibrations are available with three levels of hardware and performance   M-9603-M8 - Power Pack 1 Includes high flow K&N air filter   13hp and 16lbs/ft peak gains over stock   40lbs/ft gain at 1500rpm    M-9603-M8A - Power Pack 2 Includes GT350 cold air intake with 87mm throttle body and exclusive intake adapter (hardware available separately without calibration as part number M-9603-M50)  21hp and 24lbs/ft peak gains over stock   40lbs/ft gain at 1500rpm   Industry exclusive open air filter with CARB EO   M-9452-M8 - Power Pack 3 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   At this time Power Packs are sold separately and cannot be upgraded without the purchase of an entire kit.   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  Â
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