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Old 04-06-2009, 12:46 PM   #1
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Hi guys,

I know it'* not street legal, but have any of you cut your cat out and replaced it with a straight pipe? You'd have to put an O2 simulator on the downstream sensor but other than that will it have any ill effects on performance?
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Old 04-06-2009, 02:36 PM   #2
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Some say there'* a gain. I think the gain will depend greatly upon the setup.

Most sim'* are tough to find these days with the EPA cracking down on them. Programming out the code is another good way to keep the light from popping up.
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Old 04-06-2009, 03:10 PM   #3
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2002BONNY;

If you have emission requirements where you live you may want to think about going to a hi-flow cat rather than taking this one out. I know in some states they actually inspect your exhaust and if you have something missing, like a cat; they will fail you irregardless of the actual sampling results.

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Last edited by Purplehazeir; 04-06-2009 at 03:29 PM. Reason: Don't know the difference between a car and a cat :)
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Old 04-06-2009, 07:59 PM   #4
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You will get nearly the same results with a good over sized free flow cat, and still be leagle.
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Old 04-28-2009, 03:34 PM   #5
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Alabama couldn't care less if you removed one. Almost every sportscar with an exhaust mod has those removed. I wouldn't though unless you were making so major power because a friend of mine dynoed his eclipse turbo with the car and the readings were 180ish hp. After removing the cat it was 170ish lol go figure.
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Old 04-28-2009, 05:19 PM   #6
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I dont know about the newer models but my 95 loves the cat being removed. It has a noticable tourqe gain. The only downside is Ive been pulled over twice by two different cops for loud exaust. So high flow cat is coming soon!
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Old 04-28-2009, 05:31 PM   #7
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I bet, did you get a ticket for that? The cops around my house don't bother with it. I bought a 1996 honda accord in birmingham a few years ago and drove it all the way to north alabama with no cat or muffler lol..........i can still hear the noise in my nightmares.
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Old 04-28-2009, 06:39 PM   #8
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dont htink its a big enough gain to remove it.
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