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I was wondering what type of overflow tank can i use for an aluminum radiator and double electric fan shroud? Can i use the stock one or do i even need it?
I would recommend using the overflow recovery tank, as typically they are made from plastic. Use the original one or you can buy a replacement at the part stores. You really need one to keep air out of the system, and to visually make a quick easy check of your coolant level by looking at the tank. I can remember when they first came out with this idea, so yes it was a good idea then and it still is. Good luck!