1956 BUICK FRONT DISC BRAKE CONVERSION. THIS KIT ALLOWS YOU TO INSTALL DISC BRAKES ON YOUR STOCK SPINDLES. KIT INCLUDES: 12" ROTORS, LOADED CALIPERS, CALIPER MOUNTING BRACKETS, INNER & OUTER BEARINGS, RUBBER HOSES, DUST CAPS, SEALS, BANJO BOLTS AND ALL NECESSARY HARDWARE. DOES NOT IN CLUDED BOWER BOOSTER.