1947-53 CHEVY TRUCK FIREWALL MOUNT POWER BRAKE CONVERSION. THESE 1947-53 CHEVY/GMC TRUCK FIREWALL MOUNT POWER BRAKE BOOSTER KITS ARE DESIGNED TO ENHANCE YOUR DISC BRAKE SYSTEM AND MADE TO ALLOW EXTRA CLEARANCE OF VALVE COVER COMBINATIONS. A MUST WHEN RUNNING DISC BRAKES ON YOUR 1947-53 CHEVY OR GMC TRUCK. THIS KIT INCLUDES: • CHROMER 8" DUAL DIAPHRAGM POWER BOOSTER • FIREWALL MOUNT WITH PEDAL ASSEMBLY • CHROME PROPORTIONING VALVE (DISC APPLICATIONS ONLY) • PROPORTIONING VALVE BRACKETS AND LINES (DISC APPLICATIONS ONLY) • CHROME MASTER CYLINDER • ALL MOUNTING HARDWARE