The Supertech black-nitrided intake valve for Honda D16A1 engines is offered as a single +0.5mm oversize replacement. Supplied individually, the valve includes a black-nitrided finish and is intended for single-valve service. Check the D16A1 engine code against your application to confirm correct fitment before purchase; the listing provides the specific engine compatibility.
Supertech Honda D16A1 Black Nitrided Intake Valve - +0.5mm Oversize - Single