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* Please call for availability WAGLER WCPC6643 DUAL VALVE SPRING KIT WITH STEEL RETAINERS 2001-2016 GM 6.6L DURAMAX   Upgrade the valvetrain in your 2001-2016 GM 6.6L Duramax engine with the Wagler WCPC6643 Dual Valve Spring Kit With Steel...

* Please call for availability WAGLER WCPC6664 PUSHRODS 2001-2016 GM 6.6L DURAMAX   Upgrade the valvetrain in your 2001-2016 GM 6.6L Duramax with the Wagler WCPC6664 Pushrods. Built from 3/8" x .135 wall 4130 Chromoly, these push rods...