I was looking at my manual and I think the top end is seated in aluminum. The bottom end uses bearing shells. I always disliked the top end not having bearing shells, plus I don't believe the valve seats can be replaced. Therefore, you have to "renew" the head if anything is out of tolerance.
I agree as well, every thing I've read comparing Fram filters seem to indicate a very cheap product. Local Dodge dealer friend of mine, says when cars come in with major engine damage due to filter failure, usually it's a fram with the cardboard blown out.
How do the K&N filters stack up?
Jay
