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Exhaust Cutout/Bypass Switch

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16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHExhaust Cutout/Bypass Switch

Leading reported evidence

Run laguna seca 92db

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Suggestion

I would just have to hit the switch at T5 and then open at T8 I run Laguna Seca 92db

Exhaust Cutout/Bypass Switch
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Leading evidence: 'Run laguna seca 92db' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run laguna seca 92db' (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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Use quiet mode

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
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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 contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion

To be honest, I rarely use the quiet mode.

Exhaust Cutout/Bypass Switch
Frequently discussed actions (2)

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

Run laguna seca 92db

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

I would just have to hit the switch at T5 and then open at T8 I run Laguna Seca 92db

Exhaust Cutout/Bypass Switch

Use quiet mode

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

To be honest, I rarely use the quiet mode.

Exhaust Cutout/Bypass Switch
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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.

16 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: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Has anyone installed an exhaust turndown/cutout on their car yet? I'd be curious to know if it was possible, that way i can go from full bypass for track/scaring neighbors ...to silent mufflers again when cruising long distances.

POST 2Original post

I have it on my car and I disabled the speed cutout (so it's either full loud or full quiet) To be honest, I rarely use the quiet mode.

POST 3 / ORIGINAL POSTEROriginal post

^ can i ask which system you use?

POST 4Original post

Thought about this as well. Big with the muscle car crowd....lets you go from mild to wild with the flick of a switch. BTW: this is not PSE folks, this would be like bypassing the mufflers altogether the way the Muffler Bypass pipes sound.

POST 5 / ORIGINAL POSTEROriginal post

^ bingo. what size is the piping on our cars again? 2.5? 3"? i was looking at the QTE cutouts and they look like they would work...as long as there's enuff room to weld/clamp them in place.

POST 6Original post

something like this... http://www.dmhperformance.com/ though where would it fit on the porsche exhaust since there are no midpipes due to the engine being in the rear? on the cat pipes?

POST 7 / ORIGINAL POSTEROriginal post

yeah on the cat pipes is the only place you could fit em.

POST 9Original post

This would be a good solution for those of us that yank our mufflers and install the bypass pipes for track days. Would negate the weight savings of that approach but would retain the engine cooling of getting rid of the hot gases without heating up the cats and muffles.

POST 10 / ORIGINAL POSTEROriginal post

anyone happen 2 have a pic of the underside of a 996 on them? the piping is pretty tight down there...i think we'll be hardpressed to find the space to install the cutouts.

POST 12 / ORIGINAL POSTEROriginal post

the only place they would fit is after the cat's....on that long, straight tube section that runs out to the mufflers.

POST 13Original post

If I did it, I would put them after the headers and before the cats. More beneficial for the track days. I would just have to hit the switch at T5 and then open at T8 I run Laguna Seca 92db Jerry

POST 14Original post

I agree, the largest gains would be before the cats.... Kinda hard to do since there isn't very much pipe length from the header connector to the cat itself.

POST 15Original post

Quotes source post: 5104623

If you did that with no modification to fuel control, you would most likely lose performance (and probably damage the engine) and you would definately hurt your powerband regardless of what else you did to your NA engine.

POST 16Original post

Quotes source posts: 5104623, 5104663

I agree. I was thinking doing it after the cat cells on that small longer area of the cat pipe but before the muffler. Doing it before the cats might also trigger a CEL since there won't be a lambda-delta between the two O2 sensors.

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