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This is a brand new Fel-Pro Engine Valve Stem Oil Seal Set. Fel-Pro gaskets are the industry standard for reliable sealing in the repair environment, specifically designed to handle imperfect sealing surfaces.Key Benefits:Premium Materials: Constructed from Viton®, these seals offer superior resistance to high temperatures and harsh engine oils compared to standard rubber.Positive Stop Design: Engineered for a precise fit on the valve guide to ensure maximum oil control and prevent smoke upon startup.Complete Set: Includes all 16 seals needed for a full V8 engine refresh (Intake and Exhaust).Installation Aid: Most sets include a specialized installation tool to protect the inner lip of the seal during assembly.Vehicle Fitment:Designed primarily for Ford 4.6L and 5.4L 2V SOHC V8 engines. Common applications include:Ford: F-150, F-250, F-350, Expedition, Mustang (1996-2004), Crown VictoriaLincoln: Town Car, NavigatorMercury: Grand Marquis, Mountaineer