The Supertech black-nitrided exhaust valve for Honda and Acura K20/K24 engines is a +0.5mm oversize single replacement supplied as a drop-ship item. The listing specifies the oversize and nitrided finish; this valve is intended for use where an enlarged exhaust valve is required during valve machining for the K-series engines referenced.
Supertech Honda/Acura K20/K24 Black Nitrided Exhaust Valve - +0.5mm Oversize - Single (D/S Only)