2001-2016 Duramax Billet Main Caps (C6641)

Machined in-house at Wagler Competition Products, these Billet Main Caps increase bottom-end strength, rigidity & can be used with or without the WCP Girdle. 

Part Number: C6641

• 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 for proper installation

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