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The Hellwig LP-35 heavy-duty Load Pro helper spring with an 11-leaf stack provides a constant-rate solution rated up to 3,500 lb for Ford E-450/E40 applications (1997–2022). Intended for vehicles that regularly carry heavy loads, this kit offers fulltime spring-rate support for consistent towing or payload use. It requires the appropriate installation kit and includes tunable adjustment and a limited lifetime warranty.
Hellwig 03-18 Ford E-450 SD Load Pro- To 3500lb Constant Rate Level LC Helper Spring w/11 Leaf Stack
