You have an SRT6 right? that uses a different filter. K&N 33-2256 you can find them on ebay too and don't forget that you need 2 of them.

The oil and gauze filters require you to spray them with a special filter oil to make them more efficient and work properly. They are more work than throw away filters since you wash and dry them and then spray them with the oil, but you will save money in the long run. I haven't personally used them so I can't vouch for any performance gain you may get from them.