67-72 CHEVY & GMC TRUCK - OUR BOOSTER KITS WILL HELP YOUR TRUCK STOP BETTER THAN EVER! THESE BOLT ON KITS MOUNT TO THE FIREWALL IN THE ORIGINAL LOCATION AND USE THE FACTORY PEDAL ASSEMBLY. KIT INCLUDES: 11? SINGLE BOOSTER, MASTER CYLINDER, PROP VALVE WITH BRACKETS AND LINES (DISC BRAKE APPLICATIONS ONLY) AND ALL MOUNTING BRACKETS AND HARDWARE