PCM RM0258A upper thermostat housing gasket. Commonly used on the raw water-cooled PCM Excalibur 330 and 5.0 mpi. This will NOT FIT the EX343 engines equipped with the CES Catalyst exhaust (Use RM0290). This is a unique-sized gasket with a metal rivet to ground the housing so sensors will function properly.
- PCM Thermostat Gasket Upper Housing
- Used on 5.0L and 5.7L Motors
- 2002 and newer