CUMMINS 3959574 GENUINE OEM PISTON COOLING NOZZLE DELETE PLUG FOR 2003-2018 DODGE RAM 5.9L & 6.7L CUMMINS

The Cummins 3959574 piston cooling nozzle delete plug is a genuine OEM part designed for 2003-2018 Dodge Ram 2500 & 3500 Cummins 5.9L and 6.7L diesel engines. This plug is used to block off the factory piston cooling oil jets (squirters), commonly removed in high-performance or race-only engine builds where additional crankcase pressure control or custom piston designs are used.

By using an OEM Cummins delete plug, you ensure exact fitment and proper sealing, preventing oil leaks and maintaining internal oil pressure balance during extreme racing conditions.

Features & Benefits

• OEM Quality: Genuine Cummins for perfect fit and reliability.
• Race Applications: Commonly used in sled pulling, drag racing, and competition Cummins builds.
• Oil Control: Blocks piston cooling jets to maintain crankcase pressure and eliminate unnecessary oiling in custom piston setups.

Fitment

• 2003-2007 Dodge Ram 2500/3500 5.9L Cummins
• 2007.5-2018 Dodge Ram 2500/3500 6.7L Cummins

Cross Reference Part Numbers

• Cummins 3959574

Frequently Asked Questions

Why would I delete piston cooling nozzles?

Builders delete the nozzles in certain high-performance applications to reduce oil aeration, control crankcase pressure, or when using aftermarket pistons that do not require oil squirters.

Can this be used in a daily-driven Cummins?

No, deleting piston cooling nozzles is not recommended for daily-driven or towing trucks. This modification is primarily for race-only applications.

Is this an OEM Cummins part?

Yes. Unlike aftermarket plugs, this is a genuine Cummins OEM delete plug engineered for correct fitment and reliability.

Detailed Fitment

• 2003 Dodge Ram 2500/3500 5.9L Cummins
• 2004 Dodge Ram 2500/3500 5.9L Cummins
• 2005 Dodge Ram 2500/3500 5.9L Cummins
• 2006 Dodge Ram 2500/3500 5.9L Cummins
• 2007 Dodge Ram 2500/3500 5.9L Cummins

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