Brake Fluid AP Racing R3

APRacing Radi-CAL™ R3 Racing Brake Fluid - CP4660

The APRacing Radi-CAL™ R3 Racing Brake Fluid has been developed exclusively for high-level motorsport applications where braking systems are exposed to extreme operating temperatures. Formerly known as PRF660, Radi-CAL™ R3 delivers exceptional braking consistency with an ultra-high dry boiling point of 325°C (608°F).

Designed for professional racing environments, R3 features advanced moisture resistance, low viscosity for easier bleeding, and low compressibility for improved pedal feel and braking precision. The latest formulation now includes a special inhibitor, making the fluid compatible with magnesium components while still meeting DOT4 specifications.

Radi-CAL™ R3 can be mixed with other DOT4 racing brake fluids, although a complete system flush is recommended to achieve maximum performance.

Supplied in a silver bottle with a yellow cap, in a convenient 500 ml format.

Key Features

Premium racing brake fluid for professional motorsport use

Re-branded version of the renowned PRF660 formula

Extremely high dry boiling point of 325°C (608°F)

Advanced moisture resistance properties

Low viscosity for easier bleeding

Low compressibility for improved pedal feel

Meets DOT4 specifications

Compatible with magnesium components

Suitable for track, rally, endurance, and professional racing

500 ml bottle

Technical Specifications

Product Name: Radi-CAL™ R3

Part Number: CP4660

Capacity: 500 ml

Dry Boiling Point: 325°C

Wet E.R. Boiling Point: 195°C

Specification: DOT4