Walt,, thanks,, I would never use a tie for a fan or a cooler,, been there, and ruined that,, the idea came from a onlooker at a weekend show,to add electric fans, but only a 6" will fit, I went home and stared at the stock rad, and noticed the fins have almost a space the size of a dime,, my new rad, I would have to use force to get a flat toothpick through...I contacted the rad shop, about possibly not being able to pull enough air through??, they thought I was crazy...said to buy a high flow pump,I don't think one exists ???