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Manley Race Master exhaust valves for 1990–1999 Mazda Miata 1.8L are offered in a race-oriented stainless construction and sized at 29mm for high‑RPM applications. Manley’s Race Series valves are engineered for bracket, drag, and oval track use up to 8000 RPM, and feature swirl-polished areas, fully machined combustion faces, and endurance-focused stem and tip treatments to support demanding racing engines.
Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
