2008 Western Star 4900 Helper Springs
- Timbren®SES Rubber Helper Spring KitWestern Star 4900 2008, SES Rubber Helper Spring Kit by Timbren®. This SES Suspension Upgrade fits the rear suspension truck. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. Engineered hollow...Improves ride and handlingEliminates trailer sway and roll$667.05 - $733.75