yea I know they only show you how to tell the 98 and up cams but they told me you can't tell by the rings if they are 97 spec so I don't want to sell them as ITR's if I don't know for sure. All I can say is I don't feel any difference or hear any difference in my motor now that I got CTR's. lol if I find out they are ITR the price will prolly go up.