48-56 9 INCH REAR DISC BRAKE CONVERSIONS-5.5 - flange on rear housing - 1/2" or 3/8"

The rear disc brake conversion kit adapts rear calipers and 11 inch rear rotors to 8, 8.8 and 9" Ford rear axle assemblies. Calipers utilize the OEM integral parking brake mechanism and standard GM pads. These conversions are the easiest way to upgrade to rear disc brakes with a functional OEM style parking brake. Kits are supplied complete with rebuilt rear caliper assemblies with pads, new 11 inch diameter rotors, caliper brackets and mounting hardware. Axle bearing removal is NOT required for installation. NOTE: Minor axle flange machining is required for rotor installation on some Ford installations. Ford (5-1/2" bolt circle) 9" rear axles. SEE AXLE FLANGE DIAGRAM BELOW. IF YOUR X MEASUREMENT ON THE DIAGRAM IS 3.50 INCHES AND YOUR "Y" MEASUREMENT IS 2.375 INCHES (2-3/8") THIS KIT SHOULD FIT.