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my cats are kicking the bucket

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Old 02-06-2019, 02:59 PM
  #16  
Imo000
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Originally Posted by NuttyProfessor
No, I don't add to the intake. Mix with the gasoline. I usually put 2 cans of seafoam in a 1/4 tank of gas, drive it hard for about an hour, and then refill with top tier gasoline.

You supposed to use "top tear" gas all the time. The minimum octane rating is in the owner's manual and I think it's also on the filler cap door.
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Old 02-06-2019, 03:00 PM
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Originally Posted by 808Bill
I see they have an aerosol spray for the throttle body. I wonder how well that works?
I've wondered the same thing, because I just recently changed my engine air filter and noticed the throttle body was dirty. I've used a lot of CRC products in the past, and unless some of the Porsche gurus say otherwise, that's probably what I use over the seaform on the throttle body.
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Old 02-06-2019, 03:02 PM
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Originally Posted by Imo000
You supposed to use "top tear" gas all the time. The minimum octane rating is in the owner's manual and I think it's also on the filler cap door.
Maybe I wasn't clear in that post, but I only use top tier gasoline from either Shell or Chevron at 93 octane. The seafoam was added to kick start my lazy no good cat that love sto sleep in the garage. Seafoam woke it up within minutes of driving.
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Old 02-06-2019, 03:03 PM
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Originally Posted by Ahsai
It's possible the cat element inside has come loose, in which case you may be able to open it up and re-weld the element......

Did anyone actually do this? All the converters that I've ever taken apart has the element held by a stainless steel mesh against the converter wall. It was friction fit. Are the 996 converters different?
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Old 02-06-2019, 03:42 PM
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Originally Posted by jimham968
I replaced my cats with MagnaFlow units bought from Summit Racing. I bought the CARB certified units for about $1200 for both. About a year and 10K miles ago and still no error codes.
That's really interesting. I looked it up and these are CARB certified, is this what you have?

https://www.magnaflow.com/products?partNumber=441005

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Old 02-07-2019, 08:52 AM
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The part numbers I used were 444066 and 444067. One quirk is that the non-CARB version included the attachment clamps but they didn’t include them with the CARB version. I called Cody at MagnaFlow at 800-990-0905 and he shipped them quickly with no questions asked.
I forgot to mention if you have them professionally installed they include a 5 year 50,000 mile warrantee.
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Old 02-07-2019, 04:40 PM
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Originally Posted by jimham968
I replaced my cats with MagnaFlow units bought from Summit Racing. I bought the CARB certified units for about $1200 for both. About a year and 10K miles ago and still no error codes.
Were the MagaFlow converters any louder than stock? Thinking about buying them for my B5 S4.
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Old 02-07-2019, 06:01 PM
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They might be a little louder than stock but it could also be my wishful thinking. It was not a significant change.
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Old 02-07-2019, 06:27 PM
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Direct fit replacement

https://www.magnaflow.com/catalytic-...deral/products
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Old 02-07-2019, 07:27 PM
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I think I may have one good one from a 2000 3.4 in the garage attic that you can have for cheap. The other one has a loose core, replaced them with 200 cell cats. I’ll have to check to see which side is good...
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Old 02-07-2019, 07:38 PM
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Can you re-post the link seems to be broken? are they CARB compliant?

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Old 02-07-2019, 07:46 PM
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Originally Posted by cds72911
I think I may have one good one from a 2000 3.4 in the garage attic that you can have for cheap. The other one has a loose core, replaced them with 200 cell cats. I’ll have to check to see which side is good...
Thanks
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Old 02-07-2019, 07:48 PM
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Originally Posted by Chris(MA)
Can you re-post the link seems to be broken? are they CARB compliant?
Here's the link but no, it's not CARB legal.

https://magnaflow.com/products?partN...archTerm=49928
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Old 02-07-2019, 08:36 PM
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Originally Posted by SoCal911t
Here's the link but no, it's not CARB legal.

https://magnaflow.com/products?partN...archTerm=49928
Darn it
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Old 02-07-2019, 08:41 PM
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I think this is what you're looking for.

https://www.magnaflow.com/products?partNumber=444066
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