This aluminum thermostat housing is designed as a direct replacement 2L2Z8575AA.It fits Explorer, Mountaineer, Explorer Sport, and Explorer Sport Trac models from 2002 to 2010, as well as Mustang models with 4.0L V6 engines from 2005 to 2010.The housing is constructed from aluminum to provide heat dissipation and under normal operating conditions.This assembly is intended for both upper and lower thermostat housing applications and includes one thermostat housing unit.Compatible with interchange part numbers including 1L2Z8255AA, 2L2Z8592AA, 2L2Z8592BA, 2L2Z8592BB, 3L8Z12A648A, 902-860, RH148, RH158, 5R3Z8592BA, GL2Z8592A, and W702041S300.