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.
- Increases Bottom End Strength
- Works With Or Without WCP Girdle
- Does Not Distort When Torquing Down Main Studs
- Proudly Made In The USA!
Note: Line bore required for installation of WCP Billet Main Caps.