These versions of Forged Narrow Superlite 4R rear disc kits provide the ultimate Big Brake solution for Bronco 65 - 77 rear axles with Big Ford flange and bearing. (normally OE 11 inch diameter brakes and 3300 GVW.) Each includes a high efficiency drum style parking brake assembly. FNSL4R four piston calipers, 13 or 14 two - piece rotors, and high performance BP - 10 compound pads provide optimized and balanced braking to compliment front big brake upgrades available for Bronco platform. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking. Optional caliper finishes and rotor designs allow builders to personalize the style and performance for every application.