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The Supertech exhaust valve set for Mitsubishi 420A applications includes eight black-nitrided exhaust valves supplied as a matched set for head servicing. These valves provide consistent replacement geometry and a nitrided surface treatment for protection, intended for direct replacement during routine rebuilds or maintenance on the 420A engine head. Supplied as a complete eight-valve exhaust set.
Supertech Mitsubishi 420A Black Nitrided Exhaust Valve - Set of 8
