How to gut your primary cats (Dyno results to come soon)
06-24-14, 12:33 PM
#1
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How to gut your primary cats (Dyno results to come soon)
A fellow CL member sent me a few pics so that those who are interested in the topic could see how easy the task really is. He is currently in the process of testing different modifications and has plans to get his car on the dyno along the way. That said, please keep this thread as informative as possible since we have a true enthusiast who willing invest time and money to bring some good information to our community.
In his own words...
"The process was extremely easy, and from putting the car on the lift to driving out of my shop I was under an hour.
I used a 3/4 “ extension that had broken off, and a hammer… it was a blunt instrument type of job.
There is without a doubt a huge difference in sound, smell, and power. I’m looking forward to getting on the dyno this week"
In his own words...
"The process was extremely easy, and from putting the car on the lift to driving out of my shop I was under an hour.
I used a 3/4 “ extension that had broken off, and a hammer… it was a blunt instrument type of job.
There is without a doubt a huge difference in sound, smell, and power. I’m looking forward to getting on the dyno this week"
06-24-14, 03:07 PM
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Primary cats are removed with aftermarket headers.
O2 conditioners will be required, either Sikky or PPE units will work.
No need to replace your O2 sensors though, unless you smash one of the primary sensors by getting too rammy.
Should be plenty of space to beat out the Cat's by just removing the 4 17mm bolts holding the exhaust, and the first cross-member under the exhaust.
I would be careful of the O2 sensors on the exhaust though, dont want to damage a wire.
O2 conditioners will be required, either Sikky or PPE units will work.
No need to replace your O2 sensors though, unless you smash one of the primary sensors by getting too rammy.
Should be plenty of space to beat out the Cat's by just removing the 4 17mm bolts holding the exhaust, and the first cross-member under the exhaust.
I would be careful of the O2 sensors on the exhaust though, dont want to damage a wire.
06-24-14, 04:23 PM
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He definitely needs new OEM crush gaskets up front.. 
Whatever exhaust its connected to, shows a couple of small leaks.
Has he gotten a CEL light from gutting the CATs??
~ Joe Z
Whatever exhaust its connected to, shows a couple of small leaks.
Has he gotten a CEL light from gutting the CATs??
~ Joe Z
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06-24-14, 06:01 PM
#10
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Keep in mind most shops will not do this for you. It is a violation of Federal law with up to a $25k fine. Don't just drive up to any muffler shop and ask them to do it for you. If they say no, don't take it personally. And if you read the notes on the link, you'll see if your neighbor wants to turn you in, it's also illegal for the owner to remove or alter a working catalytic converter.
Last edited by lobuxracer; 06-24-14 at 06:08 PM.
06-24-14, 06:13 PM
#12
You're correct Lance, so anyone doing this (or installing headers) shouldn't be too proud telling everyone that he/she removed the catalytic converters. I remember when I had my first ISF, it took me a few visits to different muffler shops until I found one that was willing to cut my cats.
06-24-14, 06:43 PM
#15
Primary cats are removed with aftermarket headers.
O2 conditioners will be required, either Sikky or PPE units will work.
No need to replace your O2 sensors though, unless you smash one of the primary sensors by getting too rammy.
Should be plenty of space to beat out the Cat's by just removing the 4 17mm bolts holding the exhaust, and the first cross-member under the exhaust.
I would be careful of the O2 sensors on the exhaust though, dont want to damage a wire.
O2 conditioners will be required, either Sikky or PPE units will work.
No need to replace your O2 sensors though, unless you smash one of the primary sensors by getting too rammy.
Should be plenty of space to beat out the Cat's by just removing the 4 17mm bolts holding the exhaust, and the first cross-member under the exhaust.
I would be careful of the O2 sensors on the exhaust though, dont want to damage a wire.