Black Out Hydropower Power Brake Booster, - 63-66 GM C10/ C15 Truck Master Cylinder Kit Master Cylinder Kit,

1963-66 Chevy, GMC Truck BlackOut Series Wilwood Hydropower Power Brake Booster Hydraulic brake assist power booster 1.125" bore Wilwood master cylinder (black finish) Black Out Adjustable proportioning valve, bracket and lines Works with front disc and rear disc or drum brakes Firewall Mounting brackets