AP Radi-Cal™ R4 Brake Fluid

‘Typical’ New Dry Boiling Point: 320°C (644°F)
‘Wet’ E.R. (Equilibrium Reflux) Boiling Point: 204°C (399°F)

R4 has been explicitly designed to perform better than any other product at the extremes of heavy duty braking performance, and is currently the fluid of choice at the elite level of motorsport. With the highest dry boiling point of any racing brake fluid currently available at 644°F, R4 stands alone.