Anytime And no the head rest are fixed to the seat..... And on mine is starting to get weak so I am going to have to fix mine to. Sometime the bolt is lose and just need tighting. Should take a star socket. If not the bolt might of made the hole bigger so get a washer and try that. If those don't work might have to buy a new one or do what I do go to the junk yard. That's were a lot of my accessories come from cheaper that way lol. You can get one there.