Home/2015 Mustang Ignition NGK Iridium Spark Plugs, LTR7IX-11, 5.0 / 6.2 / Ecoboost coldest for boost $14.85 Ford Performance Irridium spark plugs (8), cold for boost, 2011-2017 Mustang GT $97.93 Ford Performance spark plugs Platinum (8), cold for boost, 2011-2017 Mustang GT $69.96 MSD Two Step Launch Master, 2011-2016 Mustang GT $272.84 MSD Two Step Launch Master, 2016-17 Mustang GT $272.84 Ford Performance 5.0L Coyote Engine Ignition Coil Set, 2011-16 Mustang $564.70 Ford Performance 5.0L Coyote Engine Ignition Coil Set, 2016+ Mustang $472.34 NGK Iridium Spark Plugs, LTR6IX, 3.5 Ecoboost $12.57