Cummins 3963379 Genuine Rocker Box Gasket

Description

The genuine Cummins 3963379 Rocker Lever Cover Gasket provides OEM-grade sealing between the rocker lever housing (“rocker box”) and the cylinder head — the critical lower seal on a 2003–2024 Ram 5.9L/6.7L ISB 24-valve diesel engine. This direct-fit part ensures a proper seal to prevent oil leaks, keep the valve train clean, and maintain engine performance under heat and oil exposure.