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Dorman 555-086 Cylinder Head Part

4.5 (2) Write Review
Free shipping on orders over $29.99

$24.19

$ 12 .99 $12.99

In Stock
  • Direct replacement
  • This engine expansion plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution - this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction - this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy construction - the kit's bolt and spring are made of hardened steel for durable, long-lasting service life


This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.


Anonymous User
Reviewed in the United States on April 22, 2016
Plugs the dip stick hole in the LS1 block perfectly!
Rob Wagner
Reviewed in the United States on April 11, 2015
Easy to install as long as your engine isn't stuffed under a hood and sealed it right up!