Whats a hi-flow catalytic converter? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-16-2004, 09:38 PM   #1
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Default Whats a hi-flow catalytic converter?

How much is it after you answer the first question.
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Old 03-16-2004, 10:35 PM   #2
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Its a high flowing exhaust piece that replaces the stock CAT. It removes some of the emmissions but not enough to allow the PCM to think its working and so users normally have to add some sort of 02 spoofer that will tell the PCM all is well.

i got mine from SLP for 180.
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Old 03-16-2004, 10:42 PM   #3
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180 for everything like the spoofer you mentioned or just the Cat? If so, I might consider it. Hmmmmmm..... SLP, thinking........
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Old 03-16-2004, 10:45 PM   #4
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Quote:
Originally Posted by ssesc93
180 for everything like the spoofer you mentioned or just the Cat? If so, I might consider it. Hmmmmmm..... SLP, thinking........
180 included the spoof, you can get it an INTENSE'* site.

I'm not sure I would get the hi-flo cat without headers, or ported manifolds. Your stock cat may flow better than the stock manifolds so your bottleneck would be the manifolds not the cat. Once you open the engine up with headers then the cat becomes the bottleneck and hence the need for the hi-flo cat. MO though, I could be wrong.
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Old 03-16-2004, 10:50 PM   #5
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Oh boy, there goes that gibberish language I can't understand again I didnt know about changing this when you upgrade that. Oh well, factory cat it is. One more thing, ain't no way in hell I am racing a car with damn near 400 tq
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Old 03-16-2004, 10:55 PM   #6
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You won't need the O2 spoof. Dual O2'* weren't added till later. From my experience, I would recommend a hi flo cat.
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Old 03-16-2004, 11:02 PM   #7
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Quote:
Originally Posted by ssesc93
no way in hell I am racing a car with damn near 400 tq
Just wait till i get the PCM
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Old 03-16-2004, 11:26 PM   #8
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We have a high flow cat on the GTP (and have for a year and a half) and it has NEVER set a code. It has no spoof or anything. The 02 sensor is plugged right into the exhaust after it, and so far no problems.

I know that now we won't ever have any problems with it because we got the code removed from the PCM so we can take the exhaust off at the track, but that was just a few weeks ago. It was fine for a year and a half before that. But I know some people do have problems getting an SES light.

Shawn
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Old 03-16-2004, 11:32 PM   #9
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Quote:
Originally Posted by dbtk2
We have a high flow cat on the GTP (and have for a year and a half) and it has NEVER set a code. It has no spoof or anything. The 02 sensor is plugged right into the exhaust after it, and so far no problems.

I know that now we won't ever have any problems with it because we got the code removed from the PCM so we can take the exhaust off at the track, but that was just a few weeks ago. It was fine for a year and a half before that. But I know some people do have problems getting an SES light.

Shawn
Mine set with the first 02 spoof, low voltage and no signal from rear 02 sensor. Replaced the spoof and it works fine now...never tested it without the spoof just changed it since it came with the cat anyway
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