Hydraulics don't work well when hydraulic fluid is boiling. Stoptech Racing STR 600 Brake Fluid exceeds DOT 4 specifications for boiling and viscosity so you won't lose brake performance in the most extreme conditions. It can be used in on the road for daily driving or on the track. It mixes with DOT 3 and 4 brake fluids so there is no need to flush your system.

StopTech STR-600 High Performance Street Brake Fluid

Typical Dry Boiling Point: 594°F (312°C)
Typical Wet Boiling Point: 404°F (206°C)
Minimum Wet Boiling Point: 383°F (195°C)
500mL metal container gives fluid a 25% longer shelf life