AMSOIL DOMINATOR DOT 4 Synthetic Racing Brake Fluid is specifically designed for racing environments where extreme heat protection is paramount. On the other hand, AMSOIL DOT 3 & 4 Synthetic Brake Fluid is ideal for powersports applications, excluding racing scenarios, that necessitate a DOT 3, 4, or 5.1 product. Moreover, it boasts a low viscosity, ensuring optimal performance even in cold weather conditions, and enhances ABS and traction-control responsiveness.