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When hauling cargo or towing adds weight to the rear, factory coils can compress and cause sag. The Coil SumoSprings Custom Helper Springs #CSS-1195R fit between the coils of your existing rear suspension to give extra support and keep your ride level without changing the unloaded height. Each insert uses a microcellular polyurethane foam inner core that cushions the suspension and becomes stiffer as weight increases. The result is a smoother, more stable ride that helps your suspension hold up under load without bottoming out.
Factory coil springs can feel harsh when fully compressed under heavy loads. These helper springs add a progressive cushion that tightens as weight builds, reducing harsh impacts and driver fatigue on long drives. The added support also cuts down on rear-end bounce so you stay more comfortable even when the road gets rough.
Extra load in the back can make a vehicle lean through turns or sway in crosswinds. By reinforcing the rear coils, these helper springs help reduce body roll and keep handling consistent. The suspension stays firmer when needed, giving you a planted feeling through curves, uneven surfaces, or when braking with weight on board.
Unlike air systems that need compressors or constant pressure checks, these polyurethane inserts install once and require no maintenance. They simply wedge between each coil rung using their H-shaped channels to stay locked in place. With no hoses or fittings to worry about, you get dependable suspension support every time you load up.
The microcellular polyurethane material resists abrasion, oil, road salt, and UV damage while handling extreme temperatures without breaking down. Each kit includes two coil spring inserts designed for rear coil suspensions that are already in good working order. They won’t increase your vehicle’s weight-carrying capacity but will help your suspension do its job longer, keeping everything level and controlled when the work gets heavy.
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Jeffrey
10/2/2025
It is definitely the fix for a saggy rear pathfinder