So, I made a stupid decision today. Figured id go ahead and gut my cat. Took me THREE hours to do it the way I wanted it. After reading all of the "good" things about doing it, I wanted to try. I cut the cat off, gutted it, then welded a piece of tube through it. Welded everything back together, installed my O2 sensor nonfouler trick, and started her up. It sounds like complete CRAP. Ugh, my AeroTurbine sounded so awesome before this mod, now its just...noise. And my truck runs terrible. Or at least it feels that way. It feels, sluggish. Maybe im not getting enough backpressure, maybe my O2 isnt reading right, I dont know. Theres no bad idle that I can tell, and no codes. This is by far the worst mod ive done.

Wow. Things lately havent been looking good for my truck. I think thats a sign (and excuse for the wife) to get a diesel lol.

 

man sorry about your luck

i also got rid of mine, it alot lounder but i still have a factory muffler

im not a 100% happy about but its ok

 

Why not just weld a y-collector in place of the cat instead of going through the trouble of gutting it?

 

Well I would consider that had it not sounded so terrible with straight pipe and a muffler. It would be the same in a sense besides the restrictive stock Y. I might just go Magnaflow Cat or sumthin.

 

I gutted mine a while back and installed catback flowmaster and pace setter headers and CAI and couldnt be happier the way it turned out sounds awesome. I have a flowmaster 44 series single inlet and outlet for sale and also a series 10 flowmaster single inlet and dual outlet. I put the 50 series on my truck today

 

this is what i did, i just wish at the time i had my new lincoln mig it would have came out nicer

 

That is something I thought of also. I was going to make my Y pipe of my own design, connect it to that same collector, NOW go to a high flow cat, to my muffler, and them dumped. I think it would run and sound better