Planet-9

Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

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YOUR RESEARCHRunning catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Leading reported evidence

Install de-cat headers

Performed · outcome unconfirmed

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Reported fixes: 0
Unsuccessful attempts: 1
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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

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Performed · outcome unconfirmed
Are OEM exhausts too quiet or not free flowing enough - I ask because I just installed de-cat headers.
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Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

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Leading evidence: 'Install de-cat headers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install de-cat headers' (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 · 7 captured posts examined · 1 partial discussions

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Run catless headers

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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

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Suggestion
that will keep me under 99db at 50ft from trackside while allowing me to continue running catless headers.
Original post Read captured discussion
Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Run on a few tracks

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
This is for a track only car that which I occasionally run on a few tracks with sound limits.
Original post Read captured discussion
Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Frequently discussed actions (3)

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

Install de-cat headers

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Are OEM exhausts too quiet or not free flowing enough - I ask because I just installed de-cat headers.
Original post Read captured discussion
Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Run catless headers

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
that will keep me under 99db at 50ft from trackside while allowing me to continue running catless headers.
Original post Read captured discussion
Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Run on a few tracks

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
This is for a track only car that which I occasionally run on a few tracks with sound limits.
Original post Read captured discussion
Running catless headers on my track car, need a free flowing, light weight, durable and quiet exhaust- Does this exhaust exist?

Coverage and how to read this overview

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.

7 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Trying to find an exhaust for my 987.2 that will keep me under 99db at 50ft from trackside while allowing me to continue running catless headers. This is for a track only car that which I occasionally run on a few tracks with sound limits. Free flowing, relatively light weight, durable enough for track use and quiet are the main criteria. Anyone have any luck finding such a setup?

POST 2Original post

Something like this? Burns Stainless NhB Competition Exhaust System 625 for Porsche Cayman 2009 - 2012

POST 3Original post

Just reached out to them, thank you!

POST 4Original post

Are OEM exhausts too quiet or not free flowing enough - I ask because I just installed de-cat headers. I also thought about cutting open a set of OEM exhausts and gutting them??

POST 5Original post

I don't have a functional OEM exhaust but they are typically on the heavy side and aren't very free flowing. This may be the best option that I'm trying to ignore. I did install my OEM headers temporarily which helped a bit but I won't know with any certainty until I'm back out at one these tracks. With more tracks having sound restrictions I believe a set of long tube headers with high flow cats will be part of my long term solution.

POST 6Original post

I may take the turbo kit off my 2011 CS so might be looking for a stock 987.2 cat-back exhaust if anyone has one and is willing to ship.

POST 7Original post

My 987.2 CS R mufflers with de-cat headers is a bit too quite for me - not sure what the dB level is but is is only slightly louder than stock

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