These Colt Cams Tappets are custom designed by Colt Cams and feature maximum crown (convex surface) this is the #1 feature to guarantee rotation on the Cummins. Over the last few years, we've noticed large inconsistencies in the crown with the current tappets on the market. Some are flat and even dished! Colt Cams addressed this issue using similar measurements of the standard tappets and maximizing the crown.
Custom Designed By Colt Cams
Maximized Crown For Best Rotation