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2003 Porsche 911 4s - catalytic converter

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCH2003 Porsche 911 4s - catalytic converter

Leading reported evidence

Run these

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I'm running these with new O2 sensors and they're fantastic:
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2003 Porsche 911 4s - catalytic converter

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Leading evidence: 'Run these' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run these' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Run these

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I'm running these with new O2 sensors and they're fantastic:
Original post Read captured discussion
2003 Porsche 911 4s - catalytic converter

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I've got a cat failing. Need a more economical alternative to $2k/cat from Porsche, that doesn't compromise performance. It's a street car and needs to pass CA smog. Has sport exhaust. Also, any advice on installers in the Bay Area (San Franciso). Thank in advance!

POST 2Original post

https://www.magnaflow.com/catalytic-...ornia/products

POST 3Original post

I'm running these with new O2 sensors and they're fantastic: https://www.topgear.co.uk/by-manufac...ll-sports-cats

POST 4Original post

Contact Carnewal.com I replace both one on my 996 4s last year work fantastic and the sound was not bad to. You have to send your cat and he will fit 200 cell inside. Price here in Canada overall 1700$ including shipping both way. Oh yes one of my cat have a problem after 1 months he fix it at absolutely no cost. I ship it at is expense he fix it en pad send it back at no charge. Amazing service, we didn't have this kind of service from our local speedshop the other side of the street.

POST 5Original post

go here: http://www.discountconverter.com/ I know the name sounds shady, but I've used them for three different cars now and they are great. $346.00 shipped to my house for my 996.

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