These are brand new OEM rear disc brake rotors,calipers,hoses and H/D brake pads that were taken off before 2015-17 Mustangs left the dealership. Professional performance long distance racing units were used to replace them. Buy them now ; so you can save money on them when needed; esp. if you race car or autocross. Priced way below FORD prices and a bargain at $295 with FREE shipping (60/80). Large and heavy. Two boxes. Keep as spares for later use or use now if needed. They may fit front too if items are the same. Everything needed is here. Thanks for looking . Take care and God Bless fordmanted2b2b