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Exhaust options

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

Discussion summary

YOUR RESEARCHExhaust options

Leading reported evidence

Replace due

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

Keep in the back of your mind that your oem cats will eventually need to be replaced due to age/use.

Exhaust options
Frequently discussed work

Replace cats

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 · Original poster

So I'll currently contemplating on either replacing my cats with a top gear 200 cell setup and hopefully get the extra decibels that I'd like.

Exhaust options
Read full discussion summary

Leading evidence: 'Replace due' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cheapest modify option' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace cats' (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 · 8 captured posts examined · 0 partial discussions

Compare 3 other evidence results

cheapest modify option

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context

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 suspect a cause
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.

Suspected cause

Fister mod probably the cheapest modify option, then Top Gear mufflers for aftermarket.

Exhaust options

Replace cats

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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
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 · Original poster

So I'll currently contemplating on either replacing my cats with a top gear 200 cell setup and hopefully get the extra decibels that I'd like.

Exhaust options

Replace cats later

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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
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

Worry about replacing the cats later.

Exhaust options
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.

Replace cats

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 · Original poster

So I'll currently contemplating on either replacing my cats with a top gear 200 cell setup and hopefully get the extra decibels that I'd like.

Exhaust options

Replace cats later

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

Worry about replacing the cats later.

Exhaust options

Replace due

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

Keep in the back of your mind that your oem cats will eventually need to be replaced due to age/use.

Exhaust options
Reported and suspected causes (1)

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

cheapest modify option

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

Fister mod probably the cheapest modify option, then Top Gear mufflers for aftermarket.

Exhaust options
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.

8 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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So my 996 came with a gemballa exhaust, which is apparently super rare these days, as I've found little information on them. It's still in great shape, but I'm really itching for a bit more growl, while also not wanting to drop a 1.5k to 2k on a new exhaust. So I'll currently contemplating on either replacing my cats with a top gear 200 cell setup and hopefully get the extra decibels that I'd like. Or give them Top Gear sport boxes a try, although the reviews for these seem very mixed. My other option is doing the Fister mod on some stock boxes that a friend is gifting to me, which would obviously. My assumption is that i probably won't notice the weight difference between my current set up and going OEM, since it's mainly a daily driver.

POST 2Original post

Is it the complete Gemballa exhaust system (headers, cats, mufflers) or just the mufflers?

POST 3Original post

Below is a link to various setup sound clips. Fister mod probably the cheapest modify option, then Top Gear mufflers for aftermarket. You will 150% not notice weight differences regardless of what you end up doing lol. https://rennlist.com/forums/996-foru...deo-clips.html

POST 4Original post

Why not modify the Gemballa mufflers ? Cut an access panel , modify and weld it up . Or do a Fister style mod to them .

POST 6 / ORIGINAL POSTEROriginal post

Quotes source post: 20232064

Because I don't want to modify it, as I'll likely resell it. And also have access to a set of OEM mufflers.

POST 7Original post

Quotes source post: 20232614

Looks like your have a couple of options. 1. OEM mufflers - find a welder to do the Gundo hack or send the mufflers to Fister. Worry about replacing the cats later. 2. Keep the Gemballa mufflers and get a good set of 200 cel cats which will add some sound. Or 3. Gundo hack the Gemballa mufflers and worry about replacing the cats later. Keep in the back of your mind that your oem cats will eventually need to be replaced due to age/use. Maybe not now, buts its coming.

POST 8Original post

If you want some more growl that is both cheap and easy take a look at the 996 muffler bypass pipes on Amazon for $135. I had seen someone mention them as a reasonably priced alternative to the ridiculous $800 Fabspeed pipes and figured it was worth a shot. Probably made in China but they are stainless steel and the welds/exhaust tips look great. I have had them on my car for a couple months now and zero complaints. Initially I had been worried they might be too loud, my 911SC with Supercup exhaust(no cat) is ear splitting, but the cats on the 996 seem to mute the harshness quite a bit. Idling at stop lights you might not even realize they aren�t stock, but above 3k they scream nicely. For a long road trip I might throw the stock exhaust back on but for my 15 mile daily commute or cruising around they are great. They probably have some drone at certain RPMs but I don�t really notice it when I�m ripping down along the beach on my way to work. I don�t know what the weight savings are but it�s probably 20-30lbs as you are removing the mufflers and replacing it with a ~16� tubes that come off the cats and go out the rear bumper.

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