My previous post has been edited and updated.
Just so that everyone knows, I did not use an oil sandwich adapter in my setup. I chose to relocate my filter, that's why I used the parts I did.
Anybody who has ever changed the oil on a KA knows that the stock filter location sucks. My new location is perfect. Very easy to access, and drains straight into a pan without drooling all over the crossmember.
That said, if you're looking for a sandwich adapter, here's a good, cheap one from a trusted retailer:
http://store.summitracing.com/...01914
To end confusion, sandwich adapters do not have two outputs. One is out, the other is in. Oil does not return directly to the pan, but rather, completes its circuit back at the "in" port of the sandwich.
So, yes, you can use a sandwich to feed to and from an oil cooler.
Also, NPT is National Pipe Thread, the pipe threading standard in the US. AN is Army/Navy and each unit is 1/16th of an inch, so -4AN is 1/4", and -8AN is 1/2".
Modified by sxseguy at 3:47 AM 9/21/2004