The Supertech black-nitrided intake valve set for the Mazda Miata 1.8L includes eight valves intended for intake service. The product is described as a matched eight-piece set with a black-nitrided finish for installations requiring like-for-like intake valve replacement on compatible 1.8L Miata engines.
Supertech Mazda Miata 1.8L Black Nitrided Intake Valve - Set of 8