This rear leaf spring delivers a 4.5 inch lift for the 2013–2018 RAM 3500 while maintaining factory payload weight ratings. The multi-leaf progressive design operates in stages: the primary three leafs provide a smooth, comfortable ride under no load; secondary leafs engage as moderate loads are applied; and the bottom overload leafs activate at maximum hauling capacity. This progressive setup preserves everyday ride quality without sacrificing the truck's ability to carry full payloads.
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