Replace that worn out and leaking heater core with a heavy duty aluminum heater core from Scott Drake. This Scott Drake exclusive is engineered for maximum durability along with easier installation and service. It features extra-long inlet and outlet tubes so they protrude through the firewall. This feature makes heater box installation easier and significantly reduces the amount of time and labor required for removing or replacing heater hoses later on. 100% aluminum construction. Will not fit 1967-1968 Mustangs with factory in-dash A/C.