Motul RBF 660 Racing Brake Fluid

RBF 660 is Motul's flagship factory-line racing fluid and one of the highest dry boiling points available in a DOT 4 spec — the default upgrade for anyone running real track sessions on a street car. Its very high boiling point gives you margin against the pedal going long after repeated heavy braking, and it stays consistent through a full lapping day.

Fully synthetic and DOT 4 compatible, so it mixes with and replaces your existing DOT 3/4/5.1 fluid. Flush at least once a season — racing fluids are hygroscopic and the wet boiling point drops as they absorb moisture.