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This Supertech black-nitrided exhaust valve is a +1mm oversize single for Mazda/Ford Duratec 2.0L and 2.3L engines, offered to accommodate valve-seat machining and selective replacement. The oversize dimension helps technicians restore correct valve-to-seat contact after regrinding. It’s intended for use during head rebuilding or service where an oversize exhaust valve is required for Duratec 2.0L/2.3L applications.
Supertech Mazda/Ford Duratec 2.0L/2.3L Black Nitrided Exhaust Valve - +1mm OS - Single (D/S Only)
