Well next time I put a timing chain in a toyota I will get the metal backed guide, but I have already bought and installed the plastic ones. I am selling my truck in April anyway :(My parents are making me). And I wish I would have read this before I bought a $90 timing cover from checker. Oh, well it will be here tomorrow so I can start driving again Thurs. I haven't had enough time to get on the computer. Too busy with work, and my truck.