Menu
Your Cart

01-16 6.6L Duramax Wagler Billet Main Caps

Strengthen the bottom end in your 2001-2016 GM 6.6L Duramax with the Wagler WCPC6641 Billet Main Caps. Designed, and machined in-house at Wagler Competition Products, these Billet Main Caps increase strength and rigidity and work with or without the WCP Girdle. 


  • WCP Billet Main Caps are designed and machined in house
  • Does not distort when torquing down main studs
  • Adds strength to the bottom end
  • Can be used with or without the WCP Girdle
  • For extra strength add the WCP Street Girdle
  • Made in the USA
  • Must be line bored


Part Number: WCPC6641 

Write a review

Please login or register to review
Tags: , 6.6 , Duramax , Wagler , Billet , Main , Caps
Cookie Notice
Our website uses cookies to enhance your shopping experience. Continued use of our website gives us your consent for the use of cookies during your visit. Please view our privacy policy to see how these cookies are used.