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Old 04-09-2012, 07:19 PM
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Cat and muffler question

So i know that utah requires a muffler if you live in davis county. But what about a cat?

And did my 99 come stock with a cat?

Anyone gut it and still able to pass emisions?
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Old 04-10-2012, 04:44 PM
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Yep have to have a cat too. I tried to sneak it by without a cat one time and instant fail. I'm sure it would pass with a gutted cat. I have an EGR delete and it passes.
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Old 04-10-2012, 06:25 PM
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cause i wanna do a muffler delete and cat delete with a straight pipe and then bolt it back in when it comes time.


but if i gut it and it doesnt pass do they give you a certain amount of time to fix it or just go straight to the state?
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Old 04-10-2012, 06:38 PM
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They told me to put the cat back on and bring it back in.
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Old 04-10-2012, 08:07 PM
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well maybe ill just do the muffler and cat delete cause if i gut it then im out a cat just in case lol


I just wanna get better mileage and i was told by a buddy with a 6.0 that he ditched cat and muffler and saw 4-6mpg gain
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Old 04-10-2012, 09:15 PM
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The cat on my 97' is and has been gutted for a few years now and I haven't had any issues getting it passed.
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Old 04-10-2012, 09:33 PM
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They only look to see if the cat is there. So a gutted cat is fine. I'm doin a straight pipe on mine soon and will just clamp a muffler delete in and put on the muffler once a year.
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Old 04-11-2012, 02:35 PM
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Quote:
Originally Posted by cweiss87 View Post
They only look to see if the cat is there. So a gutted cat is fine. I'm doin a straight pipe on mine soon and will just clamp a muffler delete in and put on the muffler once a year.

Ya thats what i wanna do.
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Old 04-11-2012, 03:36 PM
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Quote:
Originally Posted by HOTWHEELS34 View Post
Yep have to have a cat too. I tried to sneak it by without a cat one time and instant fail. I'm sure it would pass with a gutted cat. I have an EGR delete and it passes.
They pass yours with the egr delete? That is good to know since mine was deleted when I bought it.
Op: what kind of muffler delete do you plan to do? I was just thinkin of puttin in some flex pipe.
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Old 04-11-2012, 04:35 PM
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Quote:
Originally Posted by cweiss87 View Post
They pass yours with the egr delete? That is good to know since mine was deleted when I bought it.
Op: what kind of muffler delete do you plan to do? I was just thinkin of puttin in some flex pipe.
Master muffler said they will make me pipe sludged on both sides if i dont tell em what its for lol

just gotta tell em how long and what size
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