This is by far, the easiest upgraded rod and piston combo to install in the 224 Ducar and Predator. It uses EC's forged rod and flat top piston made for the similar 223 Wildcat. This Kit requires some clearance work, but very little compared to when using an ARC rod. This kit installed, puts the piston .005-010 above deck height. We recommend to use a .045 Fire Ring head gasket to achieve proper piston to head clearance.