Prothane 1-1011 Red Rear Spring Eye and HD Shackle Bushing Kit

The Prothane 1-1011 is a premium polyurethane rear spring eye and heavy-duty shackle bushing kit designed to replace worn or deteriorated OEM rubber bushings in leaf spring suspensions. In leaf spring systems, the spring eye and shackle pivot points are subjected to significant and constant forces — making bushing quality critical to suspension performance, load capacity, and ride consistency.

OEM rubber bushings are designed to minimize noise and vibration, but they have a limited service life. Once rubber bushings begin to degrade from wear, road grime, or UV exposure, leaf spring effectiveness is significantly reduced. Prothane's premium-grade polyurethane material is far more durable than rubber, resisting road contamination and maintaining its structural integrity over the long term.

Key Features:

• Premium-grade polyurethane construction — outlasts OEM rubber bushings and resists road grime, oils, and environmental wear
• Precision-fabricated components — all bushings, sleeves, and hardware are machined for an exact OEM-replacement fit
• Includes Prothane Super Grease — supplied lubricant ensures quiet operation and prevents squeaking after installation
• Provides necessary rigidity — restores proper suspension geometry and improves load-handling stability
• Available in red — Prothane's signature color, identical in durometer/hardness to their black variants
• Complete kit — includes all bushings and sleeves required for a full spring eye and shackle replacement

Proper lubrication during installation is essential — apply the included Super Grease thoroughly to each bushing to ensure smooth, squeak-free operation. The Prothane 1-1011 is the ideal upgrade for restoring suspension performance and long-term durability in leaf spring-equipped vehicles.