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.
We recommend Severe Service kits only be used with a slide-in camper, salt spreader, corner mounted crane or other ariel device. In fact, any application that requires maximum stability (reducing roll and sway) calls for a Severe Service upgrade.
- Timbren | Part Number: T/IFF550SDH
- Fitment:Direct Fit
- Front Or Rear Application:Front
- Type Of System:Rubber Spring










