LP-25 Add A Leaf Kit

The HELLWIG LP-25 Add A Leaf Kit is a rear suspension helper spring system engineered to restore load-carrying capacity and improve ride quality on vehicles that frequently operate at or near their manufacturer's weight limits. Designed for stock-height applications, this add-a-leaf kit works in concert with your vehicle's existing spring pack to provide supplemental support without requiring frame modifications or ride height adjustments.

The kit features heavy-duty steel construction with a silver powder-coat finish that resists corrosion and weathering in harsh operating conditions. At 46 lbs, this suspension upgrade is substantial enough to deliver measurable stiffness but distributes load evenly across the spring package, reducing the risk of leaf fracture under extended duty cycles. By adding a leaf to the existing spring stack, the system increases overall spring rate and load capacity while maintaining the factory ride geometry—critical for vehicles that tow, carry cargo, or operate in commercial service without the harshness associated with aftermarket coil-over or air suspension conversions.

This add-a-leaf solution is purpose-built for three distinct platforms: Dodge and Mercedes Sprinter cargo vans (2004–2016 model years), and GM full-size trucks (2020–2022 generation). Fleet operators, commercial delivery services, and heavy-duty truck owners who experience sag under payload rely on this type of suspension reinforcement to maintain axle geometry, reduce bottoming, and extend spring component lifespan. The stock-height design means no modification to cab clearance, fender gaps, or driveline angles—making it a direct bolt-on retrofit that preserves your vehicle's original proportions and handling characteristics.

HELLWIG is recognized among suspension specialists for producing OEM-quality leaf spring components and helper kits that meet or exceed factory engineering standards. The LP-25 is a proven option for vehicle owners seeking to restore suspension performance without replacing the entire spring assembly or resorting to electronic load-leveling systems that introduce maintenance complexity.