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This Boundary oil pump assembly is specified for Subaru EJ engines and is MartenWear treated, supplied with one shim for fitment. The assembly replaces the factory pump to re-establish oiling function during engine rebuilds or upgrades, offering treated surfaces intended to improve wear resistance for the Subaru EJ application identified in the product description.
Boundary Subaru EJ S2 MartenWear Treated Oil Pump Assembly (1 Shim)
