Motul RBF Factory Line Brake Fluid DOT 4 Racing Fluid - RBF 600 / RBF 660 500ml

Designed to maintain consistent braking performance under high heat and repeated heavy braking, RBF fluid delivers stable pedal feel, high boiling resistance, and reliable performance where standard brake fluids begin to fade.

Built for aggressive driving, track use, and high horsepower builds, this fluid is trusted in WRX and STI platforms requiring dependable braking under load.

Top tier – street / track / race

Developed for performance driving, aggressive street use, and motorsport environments where consistent braking performance and heat resistance are required

RBF 600 – 500ml (100949)
Best for street and track use
Ideal balance of performance, boiling resistance, and daily drivability

RBF 660 – 500ml (101667)
Designed for extreme heat and racing conditions
Best for track, competition use, and high horsepower builds

DOT 4 high-performance racing brake fluid
Maintains consistent pedal feel under high heat
Excellent resistance to vapor lock and brake fade
Compatible with ABS systems
Stable performance under repeated braking

RBF 600 boiling points
Dry boiling point: 312°C (594°F)
Wet boiling point: 205°C (401°F)

RBF 660 boiling points
Dry boiling point: 325°C (617°F)
Wet boiling point: 204°C (399°F)

Subaru WRX 2002–2026
Subaru STI 2004–2021
Compatible with all DOT 3 and DOT 4 brake systems

Type: DOT 4 racing brake fluid
Available size: 500ml (0.5 liter)
Brand: Motul

Most brake fluid services require approximately 500ml to 1 liter depending on system and bleeding method

Recommended purchase: 2 bottles for a complete flushMotul RBF factory line brake fluid is a high-performance DOT 4 racing fluid engineered for extreme braking conditions, motorsport applications, and high-performance street use.

Do not mix with silicone-based (DOT 5) brake fluids

Replace fluid regularly in performance or track-driven vehicles to maintain optimal braking performance

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