Energy Suspension Heavy Duty Shackle Set - Hyper-Flex Polyurethane

Energy Suspension Heavy Duty Shackle Sets deliver a proven performance upgrade over factory rubber suspension components for trucks, muscle cars, and off-road vehicles equipped with leaf spring suspension systems. Built with Energy Suspension's proprietary Hyper-Flex polyurethane, these shackle sets resist compression set, road grime, ozone, UV exposure, and the environmental degradation that causes OEM rubber bushings to fail prematurely — restoring and improving upon factory leaf spring pivot geometry from day one.

The shackle is the critical link connecting the leaf spring to the vehicle's frame. Worn or deteriorated bushings at this pivot point directly undermine ride quality, load capacity, and handling response. Hyper-Flex polyurethane is engineered to handle the stress at these mounting points far beyond what OEM rubber can sustain, keeping your suspension performing consistently whether you're towing, hauling, commuting, or navigating off-road terrain.

Key Features & Benefits:

• Hyper-Flex Polyurethane Construction — Resists road grime, chemicals, ozone, UV exposure, and temperature extremes that degrade factory rubber over time
• Reduced Wheel Hop — Firmer bushing material controls axle movement during hard acceleration for improved traction and driveline stability
• Improved Brake Performance — Minimizes brake shudder and maintains consistent suspension geometry under braking forces
• Enhanced Handling & Control — Tighter suspension response benefits vehicles with performance tires, horsepower upgrades, or added towing and hauling loads
• Complete Sets — Each set includes the spring bushings, shackle bushings, and hardware required for a straightforward installation
• Formula 5 Lubricant Compatible — Designed for use with Energy Suspension's own bushing lubricant for long-lasting, squeak-free performance
• Warranty Backed — Warranted against defects in workmanship and materials for passenger cars and light trucks

Energy Suspension has spent decades refining their Hyper-Flex polyurethane formula, and their Heavy Duty Shackle Sets reflect that engineering heritage. Whether you're building a daily driver, a work truck, a tow rig, or a performance street build, these shackle sets deliver a direct, bolt-in upgrade that restores proper leaf spring geometry with durability that factory rubber simply cannot match. Select your specific vehicle application from the available variants to find the correct set for your build.