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Old 01-20-2016, 08:47 PM   #1 (permalink)
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time to replace the catalytic converter

Hi Guys
I have to do some exhaust repairs on my 2000 Saturn SC1 -( manuals trans). It's a great car, 40 mpg in the summer, 35mpg winter.
I have to replace the flex joint attached to the down pipe. Unfortunately, It's a welded system. The down pipe, flex joint and cat are all one welded system. So when I do this I figure I will put a new Cat on. Is there a good cat for mileage? Is a performance or hi flow cat worth the money?
thanks

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Old 01-20-2016, 09:05 PM   #2 (permalink)
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First, Do you live in a place where they check emissions?

They do make high flow cats. They don't always work as well as the stock ones.
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Old 01-21-2016, 08:20 PM   #3 (permalink)
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Quote:
First, Do you live in a place where they check emissions?
No. I really don't want to do a cat delete either. If I delete the cat, the down stream O2 sensor will not operate correctly. I detest a perpetual check engine light.

Quote:
They do make high flow cats. They don't always work as well as the stock ones.
any recommendations? Stock replacement of otherwise?
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Old 01-21-2016, 09:27 PM   #4 (permalink)
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They sell just the flex piece that you can attach to your existing cat, or you can buy the whole setup with a new cat.
It's Walker 53325 I think for the flex piece and $59 at Rockauto.com Then you can use a universal cat for probably under $100 (I see universal Catco converters on Summit Racing for $70) (or $116 for the Walker Ultra cat at Rockauto)
They whole assembly is about $170 but only the California version shows in stock there (I think it's fine to use a Cal on a federal, just not the other way around if you lived in CA).
If all you need is the flex pipe I would just get it and not replace the converter unless it is actually bad.
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Old 01-21-2016, 10:11 PM   #5 (permalink)
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Use a spark plug non fowler to cover the rear oxygen sensor.
It will trick the rear sensor into reading the exhaust leaner than it really is.
No check engine light.

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