Prothane 6-804-BL Rear Frame Leaf Spring Shackle Bushing Kit Black

The Prothane 6-804-BL is a rear frame leaf spring shackle bushing kit engineered for various Ford vehicles from 1973 to 1979. Manufactured from Prothane's proprietary polyurethane compound, these bushings deliver a significant upgrade over the factory rubber originals, resisting compression set, tearing, and degradation from road oils, solvents, and UV exposure.

Polyurethane construction provides a firmer, more precise interface between the leaf spring shackle and the frame, translating to improved handling response and reduced axle-wrap under acceleration — all while maintaining a compliant, street-friendly ride. Unlike OEM rubber bushings that soften and deflect over time, these Prothane units hold their shape and durometer rating for the life of the vehicle.

Key Features:

• Direct OEM replacement fitment for 1973–1979 compatible Ford applications
• High-performance polyurethane construction resists oil, solvents, and UV degradation
• Black finish blends with factory hardware for a clean appearance
• Improved chassis feedback and reduced spring deflection compared to stock rubber
• Includes grease fittings or pre-greased surfaces for long-term lubrication
• Manufactured in the USA by Prothane

This bushing set is a straightforward upgrade for restorers and performance enthusiasts looking to restore or improve the rear suspension geometry on their classic Ford truck or SUV. Installation uses standard hand tools and follows original mounting locations for a hassle-free installation.