LS1 with no cats
I would just hollow them out and put them back on. I got pulled over a few weeks ago and the cop asked why me car was so loud. he then looked under the car to see if I still had my cats. 
luckly he did not notice my cut out
luckly he did not notice my cut out 
TECH Apprentice
Joined: Jan 2004
Posts: 328
Likes: 0
From: Los Angeles, CA
Sims will make the ECU think the cats are in place and working properly. Without sims or tuning, you'll get codes for low circut rear 02s, cat inefficiency, etc. If you're going to remove cats, simulate. Or save your money and wait to get headers and an off-road Y-- I don't think you'll get much power by just removing/gutting cats.
Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: Texas
Originally Posted by 1320_Racing
I would just hollow them out and put them back on. I got pulled over a few weeks ago and the cop asked why me car was so loud. he then looked under the car to see if I still had my cats. luckly he did not notice my cut out
luckly he did not notice my cut out Last edited by SSmoked99; Aug 7, 2010 at 09:44 PM.
i hate cats even pussycats lol. depends on how strict your emissions are over there, i would get the ory. Or get a 3 inch y pipe with high flowing cats if you can't get away with the ory. but factory exhaust sucks
Staging Lane
Joined: May 2005
Posts: 72
Likes: 0
From: riverside,ca
when u take ur cats off ""service engine light"" will be on,,i had it b4,and as u said the o2 sensor will trick the engine and ur service engine soon light will go desapere,,good luck and have fun with no cats
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Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: Texas
Originally Posted by xx9666xx
when u take ur cats off ""service engine light"" will be on,,i had it b4,and as u said the o2 sensor will trick the engine and ur service engine soon light will go desapere,,good luck and have fun with no cats
Last edited by SSmoked99; Aug 7, 2010 at 09:44 PM.
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Not really sure what your trying to accomplish but...
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Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: Texas
Originally Posted by LS1ownzYOU
Last edited by SSmoked99; Aug 7, 2010 at 09:45 PM.
broom stick, pry bar, screw driver, anything that will get in there and break up the catalyst will work.
Take one off and have a look in there. there's really not much to it.
good luck
Take one off and have a look in there. there's really not much to it.
good luck