Supertech supplies black-nitrided intake valves for the Mazda Miata 1.8L as an eight-valve set for intake-side replacement. The description identifies the finish and the eight-piece quantity, making this set suitable when renewing all intake valves on a compatible 1.8L Miata engine during overhaul or routine valve maintenance.
Supertech Mazda Miata 1.8L Black Nitrided Intake Valve - Set of 8