BRAKE SENSOR KIT ALLOWS YOU TO MEASURE FRONT AND REAR BRAKE PRESSURE. THIS ALSO GIVES THE USER AN OPTION TO MEASURE BRAKE BIAS. KIT INCLUDES: (1) 2000 PSI SENSOR, EXTENSION CABLE, WHIP LINE, BLEEDER AND FITTINGS. IN ORDER TO MEASURE BOTH FRONT AND REAR BRAKING PRESSURES (2) KITS WILL BE NEEDED.