I was hooked after going to the stant website and reading how it works. I ordered mine quickly and it arrived in a short time. But when I looked at this, I noticed that the hole was a lot smaller than when removing and the other two I found and had available. I wanted this for a high performance application and feel like a small hole would impede coolant flow and I want/need maximum flow for this application. However, if it was an unmodified production car, everything would be fine and theβ¦