Gutted cats

[jimmy77611]

I'm thinking about gutting my cats and adding some o2 sims. Has anyone done this? I'm wanting to add a little power but retain a stock look.

[mrr23]

did it when mine went bad a second time. gained virtually nothing, but louder exhaust.

[35thAnniZ28]

do it...sims work

[Mr. Luos]

do it...sims work

For a month or two.


Is there is a local shop that can just tune out the rear O2's for you?
It was cheaper for me to do that than it was to get sims.

[Z28LS1]

i've got sims too.. but i regret not going to a shop and getting them tuned out. I heard you could get it done for $50.. but even if its 100 i would have done it cause you'll need extentions too.. together its almost $100

[Mr. Luos]

I paid $45 for code removal for EGR and AIR.
About a year later...$50 for the rear O2 codes.

[jag42420]

Sims suck, and are expensive if you can find them. Get tuned out or trick them like this http://www.srtforums.com/forums/showthread.php?t=93604 if you eliminate the cats.

[35thAnniZ28]

i ttly regret what i said..they suck!

[jag42420]

Have one fail?

[35thAnniZ28]

2!...

[310stanger]

dont gut working cats. cats are expensive if you ever decide you want them back. plus i've read in detailed exhaust articles that gutted cats actually flow worse and dont compare to an offroad pipe. do it right and get an offroad pipe, otherwise keep the cats. its not worth the aggravation.

[DanWS6]

I wish I had just gone with the offroad pipe. Had a high flow cat blow out on me after a month. Gutted it and the other one but noticed the air was definitely not flowing quite right, removed the cats altogether and the problem went away.

[gspfunk]

I've read that there isn't much difference in power between Hi Flo cats and no cats, and you can get Magnaflow cats on ebay for $55 each. Unless you can weld, though, you'll have to pay to get them installed. ...may be a cheaper option than an O/R pipe though.