PRF660, Re-branded as Radi-CAL™ R3 - Silver bottle & Yellow cap.

AP Racing’s R3 has a dry boiling point of 325°C (608°F) and has been developed for racing use only.

R3 has advanced moisture resistance properties, low levels of viscosity (for ease of bleeding), low levels of compressibility and meets DOT4 specifications.

R3 is suitable for all top levels of motorsport where abnormal temperatures are experienced and with the introduction of an inhibitor, can now be used with magnesium components

R3 can be mixed with other DOT4 racing brake fluids, but for maximum product performance the brake system should be thoroughly purged with R3 fluid.

NOTE: With the introduction of an inhibitor R3 can now be used with magnesium components.

Designation. 
- Radi-CAL™ R3

‘Typical’ Boiling Points.
- New Dry 325°C
- ‘Wet’ E.R. 195°C

Part Number.  
- CP4660-20 (Case of 20x500ml bottles)