These versions of Forged Narrow Superlite 4R rear disc kits provide the ultimate Big Brake solution for Bronco 76-77 rear axles with Big Ford New Style 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.