Sierra 18-7876-1 GM Marine Long Oil Filter Sierra oil filters are engineered with premium grade materials that will not only withstand but excel in the extreme environment of the Marine world. Sierra ensures the excellent performance of their filters by Epoxy coating all canisters for corrosion resistance. Using a heavy-wall steel canister for further corrosion protection. Using high-efficiency filter media that meets or exceeds the OEs filtration. Backed by Sierras industry leading warranty. Ap