Shown in the picture is a good pipe template sent in by a customer. This template shows us where the water inlet goes, the location of the pipe in relation to which engine and which side. The flange in this case is a CMI and is properly fixed to the template. (We can build a pipe only as good as the template. A small error in the header or manifold end is a huge error at the end of the pipe) Take your time with the template.