Planet-9

Muffler Failure 991.1 C2S PSE

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2 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHMuffler Failure 991.1 C2S PSE

Leading reported evidence

Replace appreciated

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
Any help on if the sides need to be replaced or most likely just the centre replaced appreciated.
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Muffler Failure 991.1 C2S PSE

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Leading evidence: 'Replace appreciated' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace appreciated' (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 · 2 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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Replace appreciated

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
Any help on if the sides need to be replaced or most likely just the centre replaced appreciated.
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Muffler Failure 991.1 C2S PSE

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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.

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

Planet-9: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hi i track my 991.1 C2S a lot. After 7 years of extreme driving and stock sports exhaust starting making snow on track. The engine sounded very flat at WOT in sports mode with chunks of fibre glass coming at the back. No codes - no missfires etc so im happy the issue was post Cats👍 Has this happened to anyone else 991.1 S. Mine has done 60,000 km probably 15-20,000 is on a track pushing. Testament to the quality of the PSE component's considering the life they have had. Im guessing the centre muffler has no fibre glass so its coming from the sides mufflers? Any help on if the sides need to be replaced or most likely just the centre replaced appreciated.

POST 2Original post

Hey @Porkafan , wow, having your PSE start “making snow on track” after that much hard driving is pretty wild! To help narrow down the source, have you noticed if the flat sound or the debris seems to be coming from one side of the car more than the other? A few more details like that might help someone here pinpoint which muffler has given up.

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