Highflow cat?

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Old 10-20-2008, 06:15 PM
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Highflow cat?

What are people doing with their cats? Ive heard of high flow ones and people just gutting them out..what do you recomend?thanks
Old 10-20-2008, 07:12 PM
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high flow cat is the only way to get real performance, plus u gotta weld o2 sensor mounts, gutting the cats is just
Old 10-20-2008, 08:24 PM
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Catco high flow cat is what i recommend. had one on my last CL and its what i'm getting for this one.
Old 10-20-2008, 09:33 PM
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ill do some research but as a heads up how much do they usually run?
Old 10-20-2008, 10:27 PM
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I got a magnaflow one for $70, but it throws codes, as yours probably will. Buy an o2 simulator along with your cat.

Originally Posted by 97BlackAckCL
high flow cat is the only way to get real performance, plus u gotta weld o2 sensor mounts, gutting the cats is just

You really will not notice a difference, even if you get a full exhaust on a 2.2. I should know.

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Last edited by Gnate; 10-20-2008 at 10:30 PM.
Old 10-21-2008, 12:03 AM
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my catco cat didn't throw any codes with the stock O2 sensors.
Old 10-21-2008, 09:35 AM
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What year CL do you have and what size engine? 2.2, 2.3, 3.0L?
Old 10-21-2008, 10:00 AM
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Judging by his username I'd say 2.3
Old 10-21-2008, 10:00 AM
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^its a 2.3 judging by his username. probly a 98.

If you took out the Cat completely, would that cause a loss in performance?
Old 10-21-2008, 11:52 AM
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you'll lose all your performance because you won't be able to pass smog and be illegal to drive. taking out the whole cat converter means no filter for the exhaust, meaning restriction for air flow, meaning more performance. But your car will be loud as helll, and cops will be on your car's ass in 1minute.
Old 10-21-2008, 12:28 PM
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Originally Posted by Newbee
you'll lose all your performance because you won't be able to pass smog and be illegal to drive. taking out the whole cat converter means no filter for the exhaust, meaning restriction for air flow, meaning more performance. But your car will be loud as helll, and cops will be on your car's ass in 1minute.
Just ask gnate and his glasspack
Old 10-21-2008, 03:23 PM
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Originally Posted by DaInFaMMuS1
my catco cat didn't throw any codes with the stock O2 sensors.
same here. just got a catco for my 3.0. my catco w/ magnaflow muffler and 2.5" piping sounds great and throws no codes.
Old 10-21-2008, 03:32 PM
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I have a catco but it didn't come with o2 bungs, did you guys have to weld one on?
Old 10-21-2008, 03:39 PM
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Originally Posted by 97BlackAckCL
I have a catco but it didn't come with o2 bungs, did you guys have to weld one on?
their universal cat convertors don't come with bungs as I recall. I brought it to a local shop and they welded a bung onto it. was very easy.
Old 10-21-2008, 05:58 PM
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i have a 2.2 97..and they dont check emmisions out here..but i dont know it doesnt sound very wirth it..
Old 10-22-2008, 07:15 PM
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Originally Posted by 97BlackAckCL
Just ask gnate and his glasspack
...yeah, I still have a cat, so you can keep the smartass remarks
Old 10-23-2008, 12:49 AM
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yeah i need to get one...my cat went bad!
Old 10-23-2008, 12:08 PM
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Originally Posted by cl23
i have a 2.2 97..and they dont check emmisions out here..but i dont know it doesnt sound very wirth it..
Random Tech makes a high flow cat with stainless steel body. It's a 300 cell cat with a ceramic substrate. On some of the Acura's we have had to use an 02 extension too but I'm not certain about your car. The cat and hardware kit is $250 shipped to the cont US
Old 11-04-2008, 11:36 PM
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I wonder which cat would offer the least resistance, the magnaflow, or the catco? I'm also looking for high flow cats for my 98 3.0 CL, as well as 3" piping with magnaflow exhaust. Would the pipe have to narrow to 2.25" to connect to it? Or can you get a cat with different a diameter outlet?
Old 11-04-2008, 11:41 PM
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what? You want 3" exhaust piping on a N/A car?
Old 11-05-2008, 12:04 AM
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Originally Posted by Gnate
what? You want 3" exhaust piping on a N/A car?
Is that overkill? I am still learning a lot... What is a good diameter?
Old 11-05-2008, 12:07 AM
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2.5, dual
Old 11-05-2008, 12:10 AM
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Yeah man, that's ridiculous unless you're running with a turbo setup.

Hm well, my 2.2L came with a 2" exhaust stock - upgrade to 2.25" is best on the 2.2
I'm almost positive the 3.0 comes with a 2.25" - upgrade to 2.5" is best on the 3.0
...wait for more responses to make that official.

And you can absolutely get cat's with different sized inlets and outlets.
Old 11-05-2008, 12:12 AM
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yeah thats what i did with my CL...gotta 2.5 dual exhausts....sounds nices and looks good...damnit i need a camera ASAP
Old 11-05-2008, 12:13 AM
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yeah you do! I want to see that
Old 11-05-2008, 12:28 AM
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Originally Posted by Gnate
Yeah man, that's ridiculous unless you're running with a turbo setup.

Hm well, my 2.2L came with a 2" exhaust stock - upgrade to 2.25" is best on the 2.2
I'm almost positive the 3.0 comes with a 2.25" - upgrade to 2.5" is best on the 3.0
...wait for more responses to make that official.

And you can absolutely get cat's with different sized inlets and outlets.
Oh ok sweet. Cause all the magnaflow kits I found for old accords decreased to 2.25 to connect to the cat, and I don't really want that. I guess either of those two cats posted above would be freer flowing than stock. Would they work with the 3.0 though?

@ MoSp33d, awesome, saw some pics of other 1st gen cls with dual exhaust on here a little earlier, looked awesome as I'm sure yours does.
Old 11-05-2008, 12:32 AM
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screw cats. Mine is useless. Just go straight piping and get an o2 simulator. That's what i'm going to do.
Old 11-05-2008, 10:02 AM
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Originally Posted by Gnate
what? You want 3" exhaust piping on a N/A car?
yes, it'd been done. with performance gains. On an H22 of course.

I wouldn't bother with an exhaust on an 2.x. just get a muffler for sound.
Old 11-05-2008, 10:07 AM
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Really??? How? I'm planning on doing an h22 swap, and 3" sound nice and deep usually... I would really like more info
Old 11-05-2008, 02:33 PM
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idk i saw some fake cats online, just throwin it out there. it looks like a cat but it just has a straight pipe running through it.
Old 11-06-2008, 12:43 AM
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I can't find any 2.5" piping in any exhaust kits for 94-97 accords... Did everyone just do custom piping?
Old 11-06-2008, 09:40 AM
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From what i've seen, custom is usually cheaper than a bolt on kit.
Old 11-09-2008, 07:34 PM
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Originally Posted by Gnate
From what i've seen, custom is usually cheaper than a bolt on kit.
Yeah cheaper. But I talked to a couple of mechanics while looking into this, and they said it wouldn't last very long with the pipes they would use, maybe 3 years or so. Whereas some of those kits use high-grade stainless steel that will last a really long time. I guess it's rare for a shop around here to carry quality steel like that, then again where I'm at it is pretty rural and isolated.
Old 03-08-2009, 12:42 PM
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what size cat should i get for a stock 99 CL 3.0

2.25-2.50-3.0 inches

thanks
Old 03-08-2009, 12:57 PM
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stock 3.0 is 2.25"
Old 03-08-2009, 01:05 PM
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so this should fit perfectly on my ride?

http://cgi.ebay.com/ebaymotors/Magna...Q5fAccessories
Old 03-08-2009, 01:16 PM
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or this one
http://cgi.ebay.com/ebaymotors/Magna...Q5fAccessories
Old 03-08-2009, 02:50 PM
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I have a 2.25 till my axel back when it turns to 2.5" and my glasspack hasnt attracted any cops... even with the silencer out lol

although i did retain my stock resonator?
Old 03-08-2009, 03:02 PM
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You have a stock resonator and a glasspack resonator?
Old 03-08-2009, 03:06 PM
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Originally Posted by gn8
You have a stock resonator and a glasspack resonator?

maybe im missing something.. when under my car i noticed what i thought was a stock resonator prior to the rear axle directly in the middle of the car? and i have a glasspack muffler..

I come from the BMW world where my 528i had 3 inline resonators...?


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