Dorman 555-018 Steel Cup Expansion Plug (1 Inch) - Pack of 10

Ensure flawless operation of your 5.9 Cummins (1989-2005) with the Dorman 555-018 Steel Cup Expansion Plug. Engineered for precision, this expansion plug restores factory function with high-quality materials and rigorous testing for a perfect fit. Avoid inferior aftermarket parts and rely on Dorman's trusted quality for optimal performance and longevity.

• Direct-fit replacement matching factory specifications
• High-durability steel construction for extended lifespan
• Simple installation with no modifications needed
• Renowned for reliability in the automotive aftermarket