i wanna go cat-less, what would i need? do i just need to buy a pipe to put in place of the cat? i've read that there is a test pipe? but i've searced and have found no where to get one from...i checked ebay and nothin, doeas anybodyhave a link? or should i just go to a exhaust shop and tell them to make me one? would i throw a CEL? is there a way to not throw a code? b/c my friend w/a mazdaspeed is running turbo-back straight piping to the muffler, and he's not throwing any CELs, he's in russia right now, so i cant ask him how he did it either

 

i dont think you should throw a code. most of my friends drive LS1 T/A's and Camaros without any cats and they aint kickin any

 

I have had the same question. Before I put the SS downpipe and cat on my car I started it up just too se how it sounded and it never throw a code.

 

The only problem depending on the laws in your area will be inspection you might not pass with out a cat

 

You will throw a code. The rear o2 sensor will recognize the change. You wont see a cel light right away. It will take probably like 3 start ups.

Also if you want to be cheap you could just get a pry bar and knock the cat out. It will take you like 5 minutes after you get the downpipe off the car.

 

I bought a SS Downpipe and gutted the cat, and didnt throw a CEL for the 3 weeks I had it on

 

How much of a difference is there between a gutted and non-gutted cat?

 

I highly doubt your going to see that much difference just without a cat on the car without tuning it also, the majority of the power coming from going catless is the ability to up the timing thus more power, atleast thats the case on the 2.0L

 

^^ minimal at best. on a 2.2 it's not worth the shitty way it will sound. get maybe 1 or 2 hp from it. just get a high flow.

 

He's right. It makes your exhaust twice as loud and adds a lot of shitty sounds to it you don't hear with a cat

 

The reason the Camaros and Trans Ams can get away with it is because they have enough air moving out of the exhuast that it doesn't sound raspy. They have the power!

On a car like ours... a gutted cat WILL throw an emissions code for the rear 02 sensor. and it WILL sound like complete crap. If you want to gut it, just buy a High Flow cat... they are like $70-80

 

no cat = CEL on new vehicles. end of story

you can fix with hptuners though