Prothane 4-806BL HD Conversion Shackle Bushing Kit for Super Stock Leaf Springs - Black

The Prothane 4-806BL is a heavy-duty polyurethane conversion shackle bushing kit engineered specifically to support the upgrade to Super Stock leaf springs. Designed as a direct replacement for worn factory rubber bushings, this kit provides the added strength and durability needed when running a high-performance leaf spring setup.

Key Features:

• Heavy-Duty HD Conversion design — built to accommodate Super Stock leaf spring installations
• Premium polyurethane construction — significantly stronger than OEM rubber, resisting road grime, oils, and wear that cause factory bushings to fail prematurely
• Black finish with a small amount of graphite blended into the polyurethane, which helps reduce the potential for squeaking
• Includes leaf spring eye and shackle bushings — everything needed for the conversion in one kit
• Includes Prothane Super Grease — proper lubrication at installation is essential to prevent noise and ensure long service life
• Precision-fabricated sleeves for an accurate, secure fit at all pivot points and shackle locations
• Lifetime warranty — Prothane guarantees the product against defects in materials and workmanship for as long as the original purchaser owns the vehicle

OE leaf spring and shackle setups rely on soft rubber bushings that degrade over time due to stress, wear, and exposure to road grime. Once these bushings fail, ride quality, load-carrying capacity, and handling are all significantly compromised. Upgrading to Prothane polyurethane bushings restores and enhances suspension performance, making them an ideal choice for performance builds or heavy-use applications. Be sure to thoroughly lubricate all bushings with the included Super Grease during installation.