Radi-Cal R3 (formerly PRF660) from AP Racing is the ultimate high temperature racing brake fluid, featuring a dry boiling point of 320 degrees C which is higher than other leading brands. Radi-Cal R3 has advanced moisture resistant properties and low levels of viscosity for ease of bleeding. Radi-Cal R3 is suitable for all levels of motorsport where very high brake temperatures are experienced. Not to be mixed with other brake fluids. Any existing fluid should be drained from the system completely and it is recommended to flush the system with R3 before filling.
