Bad Cat Converter and O2 sensor. U Bend Delete?

[01STOCKGTP]

So my mechanic says i have a bad catalytic converter and 02 sensor... he says prly around 5 or 6 hundred to fix. I told him that my buddies at GPforums would be ashamed in me for getting this done and not going the route of U bend delete and losing the cat. Ive done alot of reading and am wondering what the conclusion on this mod is as far as:

*****keeping the resonator or losing it
*****rewelding the 02 sensor back on or not (will this make my 01 GTP run rich always if i don't have a rear 02 sensor?)
*****going to 3" pipe vs stock

Ive heard the exhaust sound from GPs without a resonator and really don't think ill like the metallic noise that results.

drop some knowledge on me :th_biggrin2:

 

[copperpacecar]

neither...first the maechanic is an idiot as the o2 sensor he is talking about if prop for the cat meaning its more than likely on or the other but i doubt its both at the same time. second if you dont like the sound without the resinator then keep the resinator.....third i only hollowed my cat out as they dont test the exhaust here but only do a site check to make sure its there...fourth tune the second o2 out of the computer or buy a sensor to fake the computer but if your getting rid of the cat dont put the o2 back in and no it wont make you run rich...last get the u bend delete or make your own as i did

 

[tayl5645]

U bend delete Yes.
You can run catless if you want... it smells like A**
deleting rear O2 will do nothing except set a code (it does not control fuel trims)
Resonator.. Keep the dang thing on so there no rasp.

That is all

 

[01STOCKGTP]

do i just get a piece of 2.5 inch pipe? is that stock size? or should i got 3"?

How long does the pipe i get need to be?

 

[copperpacecar]

i dont remember but it didnt fit the pipe on the car i remember that...it just took form fancy welding

 

[tstaller2005]

Ok so if I remove the u bend and have a pipe put in place, or even remove the cat, do I need to make a hole for my censor to be placed back into the pipe or can I just attach it to my frame to keep it from hanging. I do not wanna remove it and have my service engine light come on.