Maruha Radiator Cap · NA / NB / NC / ND Miata
Maruha's own-branded radiator cap — made in Japan and available in three pressure ratings to suit different build specifications and use cases. A correct-specification radiator cap is a small but important part of a properly functioning cooling system, particularly on modified or track-driven Miatas where cooling system integrity is critical.
Available Pressure Options:

0.9 kg/cm² — recommended for mostly stock cooling systems and street use
1.1 kg/cm² — standard performance specification
1.3 kg/cm² — for uprated cooling systems and track use

Fits all standard Miata radiator necks across all generations. Select the correct pressure rating for your cooling system specification at time of order.
Fitment: NA · NB · NC · ND Miata MX-5 — all standard radiator fitment.
Made in Japan. Authorized Maruha import by Chikara Motorsports — North America's only official Maruha dealer.