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.

Product Specs:

• PCM Thermostat Gasket Upper Housing
• Used on 5.0L and 5.7L Motors
• 2002 and newer

Bakes Resource Library:

• PCM Service Parts Quick Reference Guide (PDF)