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The Supertech Black Nitrided exhaust valve for Subaru EZ30D engines is available in a +1mm oversize as a single valve, offering a larger-diameter replacement where needed. The black nitriding finish improves surface hardness and resistance to exhaust-side wear. It supplies a direct, coated exhaust valve option matching EZ30D engine specifications without altering core components.
Supertech Subaru EZ30D Black Nitrided Exhaust Valve - +1mm Oversize - Single
