AP Racing Radi-CAL R4 Racing Brake Fluid

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.