Wilwood 140-13321-D Forged Narrow Superlite 4R Rear Disc Brake Kit

The Wilwood 140-13321-D Forged Narrow Superlite 4R rear disc brake kit delivers a complete big brake upgrade solution specifically engineered for 1965-1975 Ford Bronco rear axles with Small Ford flange and bearing (OE 10-inch diameter brakes, 2700-2900 GVW). This comprehensive kit transforms drum brake-equipped vehicles with modern four-piston caliper technology and significantly increased rotor surface area.

Key Features:

• Forged Narrow Superlite 4R (FNSL4R) four-piston calipers for enhanced clamping force and heat dissipation
• Two-piece vented rotors available in 13-inch or 14-inch diameters for improved thermal management
• High-performance BP-10 compound brake pads optimized for balanced braking performance
• Integrated drum-style parking brake assembly with internal shoe system for clean installation
• Superior static holding power for secure parking on inclines
• Optional caliper finishes and rotor designs available for custom appearance
• Engineered to complement Wilwood front big brake upgrades for balanced braking dynamics

This kit provides a complete bolt-on solution that replaces outdated drum brakes with modern disc brake technology while maintaining reliable parking brake functionality. The internal parking brake design eliminates external cables and hardware for a clean, professional appearance. Ideal for vintage Bronco restorations, off-road builds, and street performance applications requiring improved stopping power and fade resistance.