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The Supertech valve stem seal is a 5.5mm single replacement specified for Nissan applications. Supplied individually, it serves as a direct-fit option when a particular 5.5mm seal is required for valve-train maintenance. The seal’s purpose is to limit oil migration past the valve stem and assist in preserving proper guide lubrication on compatible Nissan engines.
Supertech Nissan 5.5mm Valve Stem Seal - Single
