The Supertech black-nitrided exhaust valve for Honda K20 and F20C1/F22C1 engines is a +1.0mm oversize single replacement supplied individually. With the nitrided finish and +1mm oversize specified, this valve is intended as an exhaust-side replacement for the referenced Honda engines when an oversize valve is required for valve work.
Supertech Honda K20 / F20C1/F22C1 Black Nitrided Exhaust Valve - +1mm Oversize - Single (D/S Only)