So i figured out its going to take awhile for me to save up the money needed for a fabricated downpipe. So i wanted to just gut the second cat after the O2 sensor, just didnt know if it would throw a code or mess anything up. Any suggestion or good enough reason not to do it?

 

you should be able to gut it, the 2nd 02 is before it so it should not throw any codes

 

are you tuned, it wont make a difference if you arent?

 

hes tuned

 

i wouldn't even fool with it

get the catless dp when you have the money

then you can swap back the catted one for any emissions down the road

 

It will throw a code. And the code will say "catalyst system efficiency below threshold, bank 1." A lot of people will argue this point with me and I don't care to hear it from them, but going without your cat is not only illegal and will cause you to fail an emissions test but it hurts your performance. It might give you a little more horsepower up top but the extreme loss of backpressure will kill your torque.

When I swapped out my cat from a stock one to a "high flow" one I gained 3 horsepower and lost 12 lbs of torque.

 

its the cat after the o2 sensor, the second one on all 08/09's

 

You should note that backpressure in the exhaust for a turbo setup is a bad thing. Gutting a cat for a sc would net a loss in torque but if you did it in a tc you would only help spool and gain hp and tq.

 

you fail at life.

 

well thats how i got my 09 t/c.i did feel a difference,but i did get a check engine light.nothing big.

 

i didnt get a chance to do it today, now im thinking whether or not to do it. And yes Glen the 2nd cat on all 08/09s is after the O2 sensor

 

I'd say instead of paying someone the few dollars to gut it I would put it away towards the downpipe. Just my 2 cents

 

he would probably do it himself. he has a tool collection that any real mechanic would be jealous of!

 

In that case go for it lol