take off my cat??

[Gmoney]

what would happen if I jsut took off my cat and didn't replace it? just welded some pipe there instead?? other then it not passin emission adn beign illegal? and is there a way to make it pass emissions?

[CamaroL32]

You will lose back pressure is all. Low end will probly drop off some. No there isn't any way I know of to pass emisions with out one.

[pgriffith]

you can use a O2 Simulator. This 02 sim will help from throwing codes. But it still probly wont pass emissions.

[Harbin1]

You won't notice any gains. I've ran my 3.4 with a gutted cat, no cat, and eventually a generic high flow cat. I've been the most satisfied with the latter set-up. Our engines must have some backpressure to operate properly. I tried a no cat, straight pipe set-up and I lost all kinds of low end. The car could barely get going. Granted that if I floored it and kept it above 4000 rpms, it ran fine. I think the straight pipe+!cat combo is the worst thing you could do to a 3.4. In my opinion, leave the cat on and get a quality cat-back exhaust put on.

I don't have emmisions in my county so I can't answer that question. Sorry.

[ November 25, 2002: Message edited by: Harbin1 ]</p>

[whopassfbody]

where is the o2 sensor? Can it be used inside a high flow cat like random tech?

[RacingReb]

How much is a O2 Simulator and where can i find it?

[CartmanSS]

To answer the question about passing emissions with a gutted cat -

You will fail the test. Very badly.