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The Hellwig LP-35 helper spring set is specified for late-model Ford F-350 SD applications to provide up to 3,500 lb level load support with a progressive-rate design. It is for single-rear-wheel multi-leaf setups only and requires a separate LP mounting kit for installation. Check vehicle fitment and whether factory overload springs are present before selecting this helper spring.
Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit
