The Hellwig LP-25 Helper Spring set the standard for all other aftermarket helper springs. Featuring a Fulltime Spring Rate design it is the workhorse of the Hellwig Spring line. This is ideal for fleet applications or vehicles that consistently carry a heavy load day in and day out.. LP-25 Progressive Rate Load Leveler Helper Springs Dodge; Ford; GM. INSTALL KIT REQUIRED. See fitment notes.. LP-25 Progressive Rate Load Leveler Helper Springs Dodge, Ford, GM. INSTALL KIT REQUIRED. See fitment notes.. Hellwig 04-09 Ford E-350 SD Load Pro - Up To 2500lb Level LC 3 Leaf Helper Spring w/o Mounting Kit. LP-25 Progressive Rate Load Leveler Helper Springs. Install Kit Required (see LP installation kits). Level Load Capacity up to 2,500lbs. Limited Lifetime Warranty. LP-25 HELPER SPRING. Leaf Helper Spring. 1 ton applications. Easy Installation. Hellwig 9510. Tunable

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