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The Supertech Black Nitrided exhaust valve for Subaru EJ20 and EJ25 engines is a coated replacement designed to improve surface hardness and wear resistance on the exhaust seat. The black nitriding finish helps reduce scuffing where the valve meets the guide and seat. Sold as a single valve, this option supports EJ20/EJ25 engine rebuilds requiring OE-style exhaust valve replacements.
Supertech Subaru EJ20/EJ25 Black Nitrided Exhaust Valve - Single (Drop Ship Only)
