? Wont it throw some codes by havin gutted cats?
My Buddys 02 silverado had gutted cat and threw codes out right away. We cleared the codes with my superchips programmer and it still wouldnt pass so he went ahead and put cats on it.

 

The insides or my driver side cat have broke lose so I need to figure out something quick and i dont wanna spend 400 bucks just to replace my cats. Need to figure this out asap.
btw im driving an 04 Sierra automatic reg cab with the 4.8.

 

The rear O2 codes can be tuned out with HPTuners or EFILive, or a mail order tune

 

I chunked my cats 2 years ago and yea tuned off the codes, Iv passed the last couple of years, they havent looked under the truck for them..

 

silverado11,

how did you make the stock y fit back in there. looks almost like it came with LTs stock