1952-53 MERCURY DISC BRAKE CONVERSION IS DESIGNED TO BOLT ON YOUR STOCK SPINDLES. THIS KIT INCLUDES: 11" ROTORS, CALIPERS, CALIPER BRACKETS, BEARINGS, SEALS, DUST CAPS, CALIPER HOSES & ALL NECESSARY HARDWARE. UPGRADED ROTORS SHOWN. THIS ITEM HAS AN ADDITIONAL OVERSIZE SHIPPING CHARGE OF 20.00