High performance catalytic converters

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Jul 8, 2020 | 01:24 PM

showdog75

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From: Hixson TN

High performance catalytic converters

I'm looking for advice regarding high performance cats. I like the looks of the spun stainless ones but do they work well? I need the smallest possible because of lack of room. I'm looking to knock down the smelly exhaust at idle. In two weeks I have a appointment with the tuner and I obviously need to get this done beforehand. Anybody regret putting cats on there swap? Thanks for any advice.

Jul 8, 2020 | 01:32 PM

Michael Yount

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Don't regret mine at all - had to put them on when I moved to this area back in '06 --- could take them off now (no more inspection because of age of car) but see no reason to do so. They work. Company I got them from back in '07 no longer in business...

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Jul 8, 2020 | 01:32 PM

wretched73

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Check out Thunderbolt cats on Ebay. I got the spun metallic, no regrets

Jul 8, 2020 | 01:40 PM

showdog75

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From: Hixson TN

Thanks guys, that's what I was hoping to hear.

Jul 8, 2020 | 02:12 PM

Michael Yount

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Mine were stainless case and substrate.

Jul 8, 2020 | 02:14 PM

hrspwr

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I have the Magnaflow high flow cats and they work great. Have had them in the car for about 6 years now and they work great. p/n I used was 59959.

Jul 8, 2020 | 07:36 PM

bobcratch

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i use MagnaFlow 99206HM cats on my swap, can be had for about 100 each or so. Work good. I don't regret them at all, i hate the smell of no cats.

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Jul 9, 2020 | 07:29 AM

Michael Yount

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I couldn't detect any difference at all before and after Andrew. The only way I was ever able to get mine to an acceptable (to me) level of quiet was to use OEM mufflers.

Jul 9, 2020 | 10:19 AM

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showdog75

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From: Hixson TN

I pulled the trigger on some Stainless Works cats. Ouch, they're not cheap but the slim design and knowing that Stainless Works is high quality I bit the bullet. Hope it's ok to put in the link for anyone following this thread.https://stainlessworks.net/catalytic...design-2-5-end

Jul 9, 2020 | 10:29 AM

#11

G Atsma

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What I have found is that converters tend to mellow the tone a bit, "knocking off the rough edges" of the sound. A bit raspier without them, more of an edge.

Jul 9, 2020 | 10:32 AM

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cpd004

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Glad to see this thread here. I was just thinking of how to curb the exhaust smell and am considering cats as well. I too, don't have much room at all. Interested to hear before vs after thoughts.

Jul 9, 2020 | 11:26 AM

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showdog75

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From: Hixson TN

Quote:

Originally Posted by cpd004

Glad to see this thread here. I was just thinking of how to curb the exhaust smell and am considering cats as well. I too, don't have much room at all. Interested to hear before vs after thoughts.

I'll definitely update the thread. I will say that when I pull it apart I'll also be replacing the Pypes Street Pro mufflers with some Borla XS Pro mufflers. I have a loose date for my tuner in two weeks so I have to get this all done beforehand.

Last edited by showdog75; Jul 9, 2020 at 02:05 PM.