The Hellwig LP-35 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.ATTENTION: MUST PURCHASE LP MOUNTING KIT FOR INSTALLATION. IF EQUIPPED WITH FACTORY CONTACT OVERLOAD SPRINGS, CHECK VEHICLE FITMENT ABOVE FOR SPECIFIC INFORMATION ON YOUR YEAR AND MODEL VEHICLE.. The Hellwig LP-35 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-35 Heavy Duty Load Leveling Helper Springs Ford 11-25 F250/350 2WD/4WD, 17-25 F450 2WD/4WD Pickup, 16-25 F250/350/450/550 Cab & Chassis 2WD/4WD Requires PN[25301] mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703. LP-35 HD Load Leveling Helper Springs Ford 11-25 F250/350 2WD/4WD, 17-25 F450 2WD/4WD Pickup, 16-25 F250/350/450/550 Cab & Chassis 2WD/4WD Requires PN 25301 mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703- SRW ONLY. LP-35 Heavy Duty Load Leveling Helper Springs Ford 11-22 F250/350 2WD/4WD; 17-22 F450 2WD/4WD Pickup; 16-22 F250/350/450/550 Cab/Chassis 2WD/4WD Requires PN25301 mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703. Hellwig 11-21 Ford F-250 Load Pro- Up To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit. Not Applicable for Vehicles Equipped w/ Load Leveling Sensors. Install Kit Required (see Load Pro installation kits). LP-35 Heavy Duty Load Leveling Helper Springs. Level Load Capacity up to 3500lbs. Limited Lifetime Warranty. LP-35 HELPER SPRING. Leaf Helper Spring. 1 ton applications. Easy Installation. Hellwig 3511. Tunable

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