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Secondary Cats - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHSecondary Cats - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Replace primary cats and they were definitely shot

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Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
Just a quick question here; I recently replaced my primary cats and they were definitely shot.
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Secondary Cats - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Replace primary cats and they were definitely shot' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace primary cats and they were definitely shot' (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.

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

Frequently discussed actions (1)

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Replace primary cats and they were definitely shot

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 · Original poster
Just a quick question here; I recently replaced my primary cats and they were definitely shot.
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Secondary Cats - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

986Forum: 1 discussions

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

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Generation: 20261026T172408Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Just a quick question here; I recently replaced my primary cats and they were definitely shot. One had a piece of the core drop out as soon as it removed the other would move if you shook it. That said, if the primary cats were in such bad shape, what is the probability that the secondary cats are broken? Have people in the forum found that was the case, if your primaries are bad so were the secondary cats? Other question is what are they there? Is it better to get the bypass kit? Does anyone know if removing the bypass will not pass CA Smog?

POST 2Original post

I removed my secondary cats but I am in Texas. I imagine you might have an issue in California but hopefully someone from there will chime in. Try a Google search that includes this forum, I believe this issue has been discussed before.

POST 3Original post

Quotes source post: 654407

I'm in San Diego (986 S): I pulled the secondary cats years ago, and have passed smog many times. These days the tech only plugs in the obd 2, and the nox etc numbers are a fraction of the limit. I don't know what Porsche was thinking.

POST 4 / ORIGINAL POSTEROriginal post

Thanks for the replies based on this info and the reported pick up in performance (8HP) they are gone

POST 5Original post

Nice! I think deleting them makes a very noticeable difference IMHO.

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