The Supertech black-nitrided exhaust valve for Honda K20 and K24 engines is supplied as a single replacement valve. The description specifies a nitrided finish; this exhaust valve is intended to be used as a replacement part in the K-series applications listed, sold individually for valve service when a single exhaust valve replacement is required.
Supertech Honda K20/K24 Black Nitrided Exhaust Valve - Single (Drop Ship Only)