Number of factory cats?

[ghunt81]

I'm curious...I know for awhile in the mid-late 90's/early 2000's Ford was putting a bazillion cats under vehicles (I recall at least one year of the V8 Mustang's having 6 cats under them), but newer vehicles generally only have 2 cats (if they have a V engine...my Mustang only had 2 factory cats).

My truck only has 2 cats. I've seen mentions of people with 4.0 trucks saying theirs had 3 or 4 cats on it. Does anybody know when that changed?