That's weird, because for the 2002 ES v6, there is no spin on filter, unless someone has just bolted one on for the heck of it. Take a look here -
https://www.oemmitsubishiparts.com/p...agramCallOut=4
I don't have access to the system, but a dealership should be able to look it up with your VIN to be sure.
It would be cheaper to get your timing belt kit from one of the vendors who sell on eBay. I've just heard that the v6 timing belt is a lot more difficult to do?
I've bought kits from these guys before -
http://www.ebay.com/itm/Timing-Belt-...4e8d52&vxp=mtr