Prothane 4-1001-BL Leaf Spring Eye & Shackle Bushing Kit - Black Polyurethane

Prothane's 4-1001-BL Leaf Spring Eye and Shackle Bushing Kit replaces worn, degraded OEM rubber bushings with premium-grade black polyurethane components engineered for superior durability and performance. In leaf spring suspension systems, the pivot points and shackle locations experience intense, repeated forces that quickly deteriorate soft factory rubber bushings—leading to looseness, imprecise handling, and accelerated wear.

Prothane polyurethane is significantly firmer than OEM rubber, resisting compression set, oil, and road chemicals that cause traditional rubber to crack and fail prematurely. The result is tighter suspension geometry, improved steering response, and a more controlled ride feel.

Key Features:

• Premium Black Polyurethane Construction – Resists deterioration from oil, grease, road chemicals, and UV exposure
• Complete Kit – Includes all necessary leaf spring eye bushings, shackle bushings, and precision-fabricated sleeves for a perfect OEM-replacement fit
• Precision Fabricated Sleeves – All related hardware and sleeves are machined to exact tolerances for proper fitment and alignment
• Improved Suspension Performance – Firmer durometer rating vs. OEM rubber delivers enhanced handling and reduced axle wrap
• Long-Lasting Durability – Polyurethane formulation outlasts standard rubber bushings under heavy-duty use conditions
• Direct OEM Replacement – Designed to install in factory suspension mounting locations without modification

Prothane has been a leader in polyurethane suspension components for decades, providing enthusiasts and professional installers with parts that deliver measurable improvements over stock rubber. The 4-1001-BL kit is an ideal upgrade for any vehicle experiencing suspension slop, premature bushing wear, or degraded handling characteristics related to the leaf spring system.