2003 Peterbilt 357 Helper Springs
- Timbren®SES Rubber Helper Spring KitPeterbilt 357 2003, 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$510.60 - $733.75