2013-2018 Cummins Rail Plug (631601)

The Industrial Injection 631601 fuel rail plug is a direct replacement for the factory pressure relief valve on the 2013-2018 6.7L Cummins. A faulty relief valve bleeds rail pressure under load, costing power — swapping in the rail plug eliminates the failure point and restores correct rail pressure.

• Direct replacement for factory pressure relief valve
• Eliminates the relief valve as a failure point
• Restores correct fuel rail pressure