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Supertech black nitrided exhaust valves for Subaru EJ20/EJ25 are sold as a set of eight and are intended for cylinder head valve replacement. The black nitrided finish is specified in the product listing to provide a protective surface treatment. These exhaust valves are supplied as direct replacement components for EJ20 and EJ25 Subaru engines where nitrided valve geometry and sizing match the factory specifications.
Supertech Subaru EJ20/EJ25 Black Nitrided Exhaust Valve - Set of 8
