NEHA

my oil cooler is only 4"x7" and I want a small fan on it. let me know if you know of anything. hours of google/bing have found nothing yet.

I used one of these motorcycle radiator fans on my intercooler to help with air flow. worked great and is close to the size you're talking about

http://www.ebay.com/itm/New-Spal-5-5-Pu ... 52&vxp=mtr

and sounds cheesy, but I've used quality computer case fans as well with good luck...but they don't hold up the elements like the fan above.

looks good to me and a nice price, i will make that work. I will order one in the am.