This SES Suspension Enhancement System Upgrade fits the rear suspension of a Ford F-250 and F-350 pickup truck. Each and every laser cut piece of steel is precision bent and powder-coated to make sure a quality fit. Timbren has engineered hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag. Whether you’re pulling a trailer or carrying a heavy load in the bed of your truck, hollow rubber springs adjust routinely to keep the vehicle level always. The SES Suspension Upgrade replaces the jounce stop on the frame. Its unique design provides superb ride quality – loaded or unloaded (There must be a 1/2″ to 1-1/2″ gap between rubber spring and axle to make sure unloaded ride quality). Unlike other auxiliary spring systems, the SES Suspension Upgrade guarantees the most efficient of both worlds. Timbren recommends Severe Service kits be used with a slide-in camper or salt spreader. In reality, any application that requires maximum stability (reducing roll and sway) calls for a Severe Service upgrade. This kit is rated at 8000 lbs capacity. Even if you’re increasing the spring rate by adding this upgrade, this doesn’t increase the GVWR (Gross Vehicle Weight Rating). Please make certain that the load does not exceed the GVWR set by the manufacturer.
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