They are made to be able to service the clutch easier instead of removing whole cover. I believe a old member that doesn't come on anymore made them I'll get u a link
If you were drag racing and had a slingshot / lockup clutch that you would be tuning a lot, fine. 99.9% of owners never look at their clutch unless there is a problem
I did get a 2003 and up type clutch cover for making a see through cover, and i was also going to cut out the oil pump and water pump part, and make a see through cover for there also. But thats on the to do list! lol