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The Hellwig LP-35 heavy-duty Load Pro helper spring with a five-leaf stack delivers a constant-rate design rated up to 3,500 lb for Ford E-450/E40 applications (1997–2022). Built for fleet or consistently heavy-load duty, it provides fulltime spring-rate support and improved stability under constant loads. Install kit required; the tunable system and limited lifetime warranty suit demanding commercial use.
Hellwig 03-19 Ford E-450 SD Load Pro- To 3500lb Constant Rate Level LC Helper Spring w/5 Leaf Stack
