AP Racing Radi-CAL R4 Racing Brake Fluid
AP Racing Radi-CAL R4

AP Racing Radi-CAL R4 Racing Brake Fluid

$39.99
Part no. AP Racing CP6005Free US shipping on orders $125+ — $9.99 otherwise.Questions about fitment? [email protected](opens in new tab)
About this part

What you need to know

AP Racing Radi-CAL R4 is the top of AP's range, with an extremely high 340°C dry boiling point — the fluid of choice at the elite level of motorsport. When you're generating serious brake energy and can't afford the pedal going long at the end of a straight, R4 gives the most thermal margin AP makes.
Like all racing fluids its 195°C wet boiling point falls as it absorbs moisture, so bleed regularly and flush each season. DOT 4 compatible and mixes with conventional DOT 3/4 fluid for bleeding.
Tech data

Specs

Dry boiling point
340°C
Wet boiling point
195°C
Base
Polyalkylene glycol ether (synthetic)
Container size
500 ml