90-97 Mazda Miata 13 psi OEM Type Radiator Cap - Gates 31333

Ensure your Miata’s cooling system maintains optimal performance with the Gates 31333 Radiator Cap, an OEM-type 13 psi pressure cap compatible with 1990–1997 Mazda MX-5 Miata (both 1.6L and 1.8L engines). This cap is engineered to precise pressure specifications to raise coolant boiling point, reduce overheating risk, and maintain stability during spirited drives and track sessions.

Built with heavy-gauge, corrosion-resistant metal, the 31333 guarantees durable construction and long-term service. It meets or exceeds OEM standards for form, fit, and function, ensuring a secure and reliable seal every time you install it.

Featuring a closed-system vent and vacuum relief valve, this cap delivers safety and efficiency—preventing coolant overflow and maintaining proper system pressure under varying conditions. Its 13 psi rating stabilizes pressure under high-temperature scenarios, ideal for aggressive driving or hot climates.

The Gates 31333 is direct-replacement ready—no adjustments needed. Whether you're rebuilding your cooling system, upgrading for reliability, or swapping out a leaking cap, it’s one of the most affordable yet performance-critical parts you can install. Made for Miata enthusiasts who demand quality and consistency, this radiator cap helps protect engine health and preserve resale value.

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