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AP Radi-Cal™ R4 Brake Fluid View larger

AP Radi-Cal™ R4 Brake Fluid

15 601644

New product

‘Typical’ New Dry Boiling Point: 320°C (644°F)
‘Wet’ E.R. (Equilibrium Reflux) Boiling Point: 204°C (399°F)

R4 has been explicitly designed to perform better than any other product at the extremes of heavy duty braking performance, and is currently the fluid of choice at the elite level of motorsport. R4 has the highest dry boiling point of any racing brake fluid currently available at 644°F.

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$ 39.25

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R4R3R2R1Factory R DOT 5.1
Dry Boiling Point (°F)644°F608°F594°F516°F516°F
Wet Boiling Point (°F)399°F399°F399°F304°F369°F
Intended ApplicationEndurance RacingSprint RacingRacing / Track DayAuto-X / RoadRoad / Auto-X / Track day
Retail Price per 500ml$39.25$29.95$19.95$17.95$12.95

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AP Radi-Cal™ R4 Brake Fluid

AP Radi-Cal™ R4 Brake Fluid

‘Typical’ New Dry Boiling Point: 320°C (644°F)
‘Wet’ E.R. (Equilibrium Reflux) Boiling Point: 204°C (399°F)

R4 has been explicitly designed to perform better than any other product at the extremes of heavy duty braking performance, and is currently the fluid of choice at the elite level of motorsport. R4 has the highest dry boiling point of any racing brake fluid currently available at 644°F.

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