If one piece of this integral system fails to perform, you will notice immediate drops in performance levels and drivability. That is why CJ Pony Parts keeps a supply of 2015 Mustang ignition system replacement and aftermarket equipment in-stock at all times for our customers who are in need. Browse our selection of new ignition equipment and locate the piece best suited for you, enhance the ignition system of your Mustang with parts coming from companies such as Accel, Petronix and Ford Racing.