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post #1 of 9 (permalink) Old 09-14-2009, 06:56 AM Thread Starter
 
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Which Cat to choose?

I need to replace my cats, I've been doing some looking and I'm not sure which Cats I should get for my car.

I need to know what size the exhaust pipes are that the cats mount to, but I also need to find 3-way cats because I would like to only run 2 of them, and loose the 3rd.


I was considering the Magnaflow 94004 but I don't know if it's 3-way or not.

Whats a good set of cats and can I get away with running only 2?
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post #2 of 9 (permalink) Old 09-15-2009, 08:28 PM Thread Starter
 
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so I guess then since no one has said anything, that must be a 3-way cat, and I can use two of those instead of my 3 current ones?!
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post #3 of 9 (permalink) Old 09-15-2009, 08:40 PM
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post #4 of 9 (permalink) Old 09-15-2009, 08:41 PM
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I'm not quite sure, but I believe the converters on our cars are NOT 3-way.

I'm going to be replacing my converters soon, too, but I'm going with the Magnaflow #23343 Direct-Fit y-pipe assembly with mandrel-bent pipes.

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post #5 of 9 (permalink) Old 09-15-2009, 08:45 PM
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I stand corrected! I guess our converters ARE 3-way.

Dennis
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post #6 of 9 (permalink) Old 09-15-2009, 10:16 PM Thread Starter
 
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I always forgot about those damn articles....

so is it a 3-way system because of the third cat?? or is each of the 3 cats a 3-way, dealing with all gasses?

basically, can I remove that middle one/third one and pass an E-test, and if yes, will the magnaflow cat I mentioned above be the correct one for this mod/fix?
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post #7 of 9 (permalink) Old 09-18-2009, 07:08 AM Thread Starter
 
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so I'm pretty stupid, In my previous rattling thread, someone posted the link to the 94004 cats, however this still doesn't answer the overall question of weather or not that cat is a 3-way and will allow me to delete my 3rd cat and still pass an e-test?
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post #8 of 9 (permalink) Old 09-18-2009, 12:59 PM
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Are you planning on keeping the car for a few years yet? Just get an etest done, and then go and mod away. Our etests are good for a year, and you wont need one for two years following the renewal date.

I got mine in April, but my renewal is not until December 09, so i technically dont need another etest until December 2011 !! LOL

You can always change it again down the road if you do in fact fail an etest. Actually, this would probably buy you another two years because you would get a "conditional pass" seeing as the work involved for the replacement of 2 catalytic converters with labour would be well over 450$ from a dealership. So essentially you are buying yourself like 4 years of time without an etest haha.

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post #9 of 9 (permalink) Old 09-18-2009, 06:26 PM Thread Starter
 
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seems like ti easier to just get the proper 3-way cat that handles all gasses, drop the third and not worry about it.

biggest reason I want to drop the third one is cost. Why spend the money I don't have, if I don't have to. My next e-test is next year, in aug I think, but I also don't want to have to go back and do more work that can also be avoided by simply doing it right the first time.

If I can drop my third cat and run just these two converters, then that's it the job is done, otherwise I end up having to spend more money on the third one, and/or end up having to go back under there and do more work to put it on later.

now that I'm thinking about it too, will the O2 sensors need to be replaced? I would assume yes it might be a good idea with new cats.

are they all the same sensor??

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Wire Length 13.15; # of Wires 4; O.E. Quality Replacement Sensor; Front

Last edited by BigJohnny; 09-18-2009 at 10:03 PM.
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