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HKS High Pressure Radiator Cap Limited Race Edition for the Mazda RX-8. In a cooling system, a higher pressure equates to a higher boiling point for the coolant. Higher coolant pressures also transfer heat from the rotor housings more efficiently.


  • Specification is 1.1 kilograms per square centimeter
  • Made in Japan
  • Exclusive line of branded accessories and apparel lets you make a style statement


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HKS Reservoir Cap 15009-AK004

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