Breathing Easier...MAF and CAT Feedback

[Scarsman]

Well, that sounds right to me. When I did the exhaust on a 93 Suburban I used to have I talked to Flowmaster and I was told the same thing. They said my Suburban had the older style cat, which was HIGHLY restrictive, but that later in the 1990's their design was completely changed, and the new ones now flow very well with very little restriction. To the point where there is no point in eliminating them on a street vehicle. I also called and talked to someone at Catco, and was told pretty much the same thing. I used a Catco hi-flo cat on my Suburban with a 3" catback system from Flowmaster.

If you look through a modern cat you can see right through it. They have a sort of honeycomb structure inside instead of the old ones that looked like styrofoam inside with. The old ones actually had to force the exhaust through the catylist substance.

I would stay with the stock one unless you are changing exhaust size or going true dual. And then I would still just use a good modern cat. Or two.