cat or not?
New User
Joined: Jul 2002
Posts: 10
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From: versailles usa
cat or not?
I have a 92 f150 with a 351w. I have a cat back exhaust on it right now but it is not loud enough for me. I was wondering if i took that second at off would i have to deal with any o2 sensor problems? or would it not hurt at all. i was also wondering if i gutted out the first one, would it effect my o2 sensor or would it be possible to take it off as well? any help is appreciated, by the way there are no smog restrictions where i live.
Freshman User
Joined: Mar 2002
Posts: 48
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From: Memphis The Dirty South
cat or not?
I had a 95 Bronco 351 with 2 cats. I had the one closest to the muffler cut off and put on a one in two out 40 series Flowmaster. The o2 sensor is before the first cat (the one closest to the engine) so it shouldn't give you any trouble.
Powerstroke Doctor
Joined: Aug 2002
Posts: 474
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From: Loxahatchee, FL
cat or not?
I have an 88 F-150 with a 302 and cat back flowmasters. I cut off the second cat and gutted the first one and I have had no problems, It sounds good and I felt a slight power gain. If you do hollow out the first one don't conect your exhaist back up for a day or so tho so that all of the stuff blows out. After you drive it for a little bit poke it out again then look in there with a spot light opr something.
Freshman User
Joined: Sep 2002
Posts: 49
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From: House
cat or not?
I have a 1992 f150 with a 302 and I replaced the the cat with a bazani equalizer pipe and it is awesome. The sound is great I have no complains I did replace the flowmaster with a ravin muffler and it sounds better. You can hear my truck coming down the street.
New User
Joined: Sep 2002
Posts: 9
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From: rolla us
cat or not?
there is some company that makes a deal that fools teh computer making it think that it has back pressure but not real sure how it works or what exactly what it is. i know this becouse im gonna have some exaust work done to mine (im gonna cut the cats off cut the h-pipe off and run 40 series flow masters out the bach with a set of tips
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