Timbren SES Suspension Enhancement System # FF550SDH [Front Severe Service Kit]
This SES Suspension Upgrade fits the front suspension of a Ford F-350, F-450 & F-550 cab & chassis truck. Each laser cut piece of steel is precision welded and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs (weight from a snowplow or heavy aftermarket accessories – such as a steel bumper) the harder they work to prevent front-end sag.