The Supertech black-nitrided exhaust valve for Honda H22A1 and H22A4 engines is supplied as a single replacement valve. Finished with a black nitride treatment per the product text, this exhaust valve is intended to replace a worn exhaust valve on the listed H22 applications and is sold individually for valve service or repair.
Supertech Honda H22A1/H22A4 Black Nitrided Exhaust Valve - Single (Drop Ship Only)