Cat and muffler question

[96MegaStroker]

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?

[HOTWHEELS34]

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.

[96MegaStroker]

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?

[HOTWHEELS34]

They told me to put the cat back on and bring it back in.

[96MegaStroker]

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

[02psd]

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.

[cweiss87]

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.

[96MegaStroker]

Originally Posted by cweiss87

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.

[cweiss87]

Originally Posted by HOTWHEELS34

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.

[96MegaStroker]

Originally Posted by cweiss87

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