Allstar Performance Hexagon Radiator Cap; 29 to 31 PSI (Universal; Some Adaptation May Be Required)

Secure and Consistent Cooling System Pressure Control. The Allstar Performance Hexagon Radiator Cap is engineered to regulate higher pressure levels in modified or racing cooling systems. With a 29–31 PSI range, this cap helps raise the coolant boiling point, improving heat dissipation in performance applications. Its hex body offers a secure grip for easy removal, even in hot or slippery conditions.

Heavy-Duty Design for Long-Term Reliability. Made from anodized aluminum, the cap is resistant to corrosion, vibration, and thermal cycling. The high-tolerance threading ensures compatibility with most aftermarket and OEM radiator necks, and its pressure rating is ideal for high-demand engines running under increased thermal loads.

Installation. This product installs by threading onto a compatible radiator neck; verify pressure requirements before installation.

Application. This Allstar Performance Hexagon Radiator Cap; 29 to 31 PSI fits universal applications; some adaptation may be required.

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