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1999–2005 Mazda MX-5 Miata Radiator & Cooling FAQ's

Please read our FAQs page to find out more.

Will a thicker radiator help a track‑driven NB?

Yes—higher‑efficiency cores with proper ducting reduce heat‑soak. Add a shroud and bleed carefully to avoid air pockets.

Is an oil cooler necessary for mountain runs or boost?

For sustained high RPM or FI, a thermostatic cooler stabilizes temps. Route lines away from heat and protect them with sleeves.

How do I improve airflow through the NB nose?

Seal gaps with foam, add under‑trays/splitters to improve pressure differential, and keep the A/C condenser clean to avoid pre‑heating.