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The Supertech black-nitrided exhaust valve for Toyota 4AGE 20V applications is sold as a set of eight with a +1mm oversize. The black nitrided surface treatment provides improved surface hardness and wear resistance for exhaust service while the oversize option supports seat reconditioning. Supplied as matched sets to maintain consistent valve geometry across the head.
Supertech Toyota 4AGE 20V Black Nitrided Exhaust Valve - +1mm Oversize - Set of 8
