Radiator Caps

 Show your HKS pride and let the real racers know you mean business with the Limited Edition D1 Radiator Cap.

Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap! This Koyorad Hyper Cap withstands an increased valve pressure rating of 1.3kgf...

Mishimoto has developed a carbon fiber radiator cap to enhance the style of your engine bay while maintaining the pressure in your cooling system. Getting the most out of your performance parts comes...

A perfect replacement for your OEM radiator cap, the Mishimoto Temperature Gauge cap will provide increased pressure tolerance (1.3 Bar), while providing an accurate temperature reading of your coolant...

The Skunk2 Radiator Cap increases internal radiator pressure, thus physically raising the coolant boiling point and increasing cooling efficiency. The open valve pressure is 1.3kg/cm compared to the...