Sierra 18-7871 Oil Filter Engineered with premium grade materials that will excel in the extreme marine environment Epoxy coated for corrosion resistance Heavy-wall steel canister for further corrosion protection High-efficiency filter media that meets or exceeds the OEs filtration Backed by Sierras industry leading warranty Manufactured to meet or exceed OEM specifications Field-tested and approved Interchangeable with Mallory 9-57902 Mercruiser Stern Drive 35-805809 35-805809T California Resid