996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

decisions decisions...I want to run catless. Not sure if i should gut out my cats on

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Old Dec 28, 2011 | 10:18 PM
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decisions decisions...I want to run catless. Not sure if i should gut out my cats on

My FVD exhaust system, Or sell and get a premade catless exhaust?? I have no problem with the work behind removing the cats, Just not sure if its worth taking out perfectly good cats out of a great exhaust. What would you guys do? Clearly the fact that i could remove the cats out of my exhaust in a day for free is great. Not sure i wan the headache of having to selling my exhaust to buy another...Might as well mod my current one??
 
Old Dec 29, 2011 | 12:18 AM
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Hi,What cell count cats do you have??....If they are 100 cell count ones,I dont think it would be that noticable unless you are heavily modified....Sorry to say but the other part of this is if you have good size piping in the muffler system to take advantage of gutting out the cats....No matter what piping size ,you should gain spool time and low mid range at least...This all depends on how modified you are...I have been there, done that,,,just sharing my info....Good Luck
 
Old Dec 29, 2011 | 12:33 AM
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Originally Posted by awdbiturbo1
My FVD exhaust system, Or sell and get a premade catless exhaust?? I have no problem with the work behind removing the cats, Just not sure if its worth taking out perfectly good cats out of a great exhaust. What would you guys do? Clearly the fact that i could remove the cats out of my exhaust in a day for free is great. Not sure i wan the headache of having to selling my exhaust to buy another...Might as well mod my current one??
Sell what you got. Get a componet system that lets you swap out cats/no cats, muffler/no muffler. I think several board sponsor make them. Or just keep the FVD and go nuts with some straight pipes. I don't know what type of smog test you have were you live, but it always wise to be able to put some cats back on to pass.
 

Last edited by Duane996tt; Dec 29, 2011 at 12:35 AM.
Old Dec 29, 2011 | 04:10 PM
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Old Dec 29, 2011 | 05:11 PM
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DO you have it flashed so that it will not throw a cel?
 
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Old Dec 29, 2011 | 05:14 PM
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Originally Posted by MARKSKI@911tuning
DO you have it flashed so that it will not throw a cel?
I have O2 sensor spacers and flash yes. How u enjoying our cold uk evening if your around tomorrow I'll come show you.
 
Old Dec 29, 2011 | 05:39 PM
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Originally Posted by MARKSKI@911tuning
DO you have it flashed so that it will not throw a cel?
yes i do, epl tune. ttboost's old car.
 
Old Dec 29, 2011 | 06:09 PM
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That exhaust flows REALLY good. I seem to recall the rear O2's already being coded out because of that. Gutting those cats will only ruin a very, very expensive exhaust system, and likely not notice a seat of the pants results.
 
Old Dec 29, 2011 | 06:39 PM
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