Here is something I would like to point out - it took me by surprise when I came arcoss these. If these are mentioned somewhere, I totally missed it. In order to run the largest silicone hose through the core support, I had to remove these. Each one is held in by 2 push-pins. It takes some magic to get them out, but you can. I am still wondering why the little flappers are needed. Do you think they work like roof flaps on Nascar Two more parts for the Crossfire OEM box in storage!