These Heads are our replacement with Dart not making the castings we used for a long time. These start out as a 220cc head then we have a CNC Porting program that machines them out to 230cc. With the porting program they run as good as our Dart head which we previously used. We use these heads on bigger cubic inch cast iron engines with dome type pistons. They can be used with flat tappet or roller camshafts. We have part numbers for both options.
