Wagler Billet Main Caps, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# WCPC6641

$750.00 Includes Free Shipping.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel

Designed and machined in house at Wagler Competition, these billet engine main caps increase strength and block rigidity for stock or built trucks.


  • Adds strength to the bottom end
  • Can be used with or without the main girdle
  • Made in the USA


    • Must be line bored
    • For extra strength, pair with main girdle