I have a 97 ext cab lariat with the 4.6 and I was just looking under my truck today and noticed that it looks like I have 4 cats. I know that some f150's have them but I thought it was only the 5.4's.

Also why does my 4.6 have what looks like 5.4 manifolds. That is what i'm looking at isn't it? Do they just use the same for both engines?


Just a couple of questions I had.