NOW YOU CAN CONVERT YOUR 49-51 MERCURY TO DISC BRAKES WITH OUT HAVING TO CHANGE OR MACHINE YOUR STOCK SPINDLES. THIS IS A TRUE STOCK SPINDLE BOLT ON KIT. CONVERSION INCLUDES: 11" ROTORS, CALIPERS w/ PADS, CALIPER BRACKETS, BEARING RACES, BEARINGS, SEALS, DUST CAPS, HOSES & ALL NECESARRY HARDWARE. THIS ITEM HAS AN ADDITIONAL OVERSIZE SHIPPING CHARGE OF 20.00 - UPGRADED ROTORS SHOWN. 5 ON 5 1/2" BOLT PATTERN ONLY **MOVES WHEELS OUT ABOUT 1/4" ON EACH SIDE** ***WILL NOT WORK WITH DROP SPINDLES***