Upgrade the valvetrain in your 2001-2016 GM 6.6L Duramax engine with the Wagler WCPC6643 Dual Valve Spring Kit With Steel Retainers. Designed to work with your factory spring shim, the dual valve spring kit increases seat pressure to 145lbs at 1.650 installed height.
- 145lb Seat Pressure @ 1.650 Installed Height
- Works With The Factory Spring Shim
- Coil Bind @ 1.090
Note: Wagler Competition Products recommends the use of the Wagler WCPC6664 Push Rods with the installation of the Dual Valve Spring Kit.