SKU: ENE4-2135G
UPC: 703639331681
MPN: 4.2135G
The 64-73 Mustang Complete Spring & Shackle Set Black from Energy Suspension is engineered for restless enthusiasts who refuse to settle for worn-out factory suspension geometry. Whether you're rebuilding a first-generation classic or upgrading a tired chassis, this complete kit addresses the most common source of poor handling on vintage Mustangs: deteriorated rubber bushings and aged shackle hardware. Factory mounts compress, crack, and allow excessive chassis flex—symptoms every experienced Mustang owner recognizes. This polyurethane-based solution restores structural integrity and ride quality in one complete package.
Energy Suspension's Hyper-Flex polyurethane bushings replace the original rubber components with a material engineered to withstand heat, oil, and decades of suspension cycling without degradation. The complete spring and shackle assembly arrives as a matched set—springs, bushings, and cadmium-plated steel hardware all coordinated for proper load distribution and geometry. Polyurethane offers a significant advantage over rubber: it resists the UV breakdown and hardening that makes vintage Mustang suspensions feel loose and unresponsive. The steel construction ensures durability while the cadmium finish resists corrosion, critical for long-term reliability whether your car sits in climate-controlled storage or sees regular driving.
Installation works best for owners performing a full suspension refresh—this kit pairs seamlessly with frame work, brake line replacement, or complete undercarriage restoration. The 64-73 Mustang platform benefits dramatically from this upgrade because the original suspension geometry compounds over time as bushings wear; restoring the shackle and spring assembly eliminates the cascading wear patterns that damage alignment and tire life. Fitment is model-specific to 1964–1973 Ford Mustang chassis, making compatibility straightforward. Expect measurable improvements in cornering response, reduced body roll, and a tighter feel when turning or braking—the hallmark of proper suspension control that separates a restored classic from a project car.
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