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Backed by Sierra\’s industry leading warranty and engineered with premium grade materials that will excel in the extreme marine environment, this oil filter features a heavy-wall steel canister and epoxy coating for further corrosion protection, as well as high-efficiency filter media that meets or exceeds the OEs filtration and an anti-drain back valve. Manufactured to meet or exceed OEM specifications. Thread Spec:20mm x 1.5 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 OE\’s filtration Backed by Sierra\’s industry leading warranty Anti-Drain-Back Valve For:8/9.9 hp O/B\’s (323cc), 15/20 hp carbureted O/B\’s, and 25/30 hp EFI (MY2006 & Newer)