JBA 65-66 Ford Mustang 260-428 409SS Dual Through Rear Valance Header Back Exhaust - 40-2653 JBA Header Back Exhaust 65-66 Ford Mustang 260-428 409SS Dual Through Rear ValanceThis Part Fits:YearMakeModelSubmodel1964-1966FordMustangBase1965-1966FordMustangShelby GT-3501966FordMustangShelby GT-350H