SPOON Radiator Cap. The Spoon Sports radiator cap functions to increase the pressure inside the radiator; the laws of physics then apply accordingly, even when the temperature of the coolant water exceeds 100Â°C, boiling can be avoided so gas bubbles and subsequent hot spots are avoided and increased cooling performance may be achieved. STD 1.1 increased to 1.35kgf/cm2.
- Type D is suitable for most factory Honda radiators.
- Type F is suitable for most aftermarket radiators.