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911uk

Improving the exhaust 'note'

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHImproving the exhaust 'note'

Leading reported evidence

Use had never done it

Performed · outcome unconfirmed

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Performed · outcome unconfirmed

The guy I used had never done it before but was an excellent welder..

Improving the exhaust 'note'
Frequently discussed work

Recommend someone

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Suggestion · Original poster

Anyone else recommend someone to do a gundo hack?

Improving the exhaust 'note'
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Leading evidence: 'Use had never done it' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend someone' (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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Recommend someone

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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.

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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 · Original poster

Anyone else recommend someone to do a gundo hack?

Improving the exhaust 'note'

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

OP, you could possibly consider the 'gundo hack" which is where an extra piece of pipe is added between the inlet and outlet pipes on the existing boxes or send your existing exhausts to Carnewal who modify the internals and both of these would give a slightly louder/deeper sound possibly without the need to change the 'cats".

Improving the exhaust 'note'

Replace boxes

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

You are probably best to listen to a few cars with different aftermarket exhausts if you are going to change the boxes.

Improving the exhaust 'note'

Replace tone and timbre as the revs rise, throttle dependent

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

The PSE is one of the better ones, as you get a changing tone and timbre as the revs rise, throttle dependent.

Improving the exhaust 'note'
Frequently discussed actions (5)

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

Recommend someone

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

Anyone else recommend someone to do a gundo hack?

Improving the exhaust 'note'

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

OP, you could possibly consider the 'gundo hack" which is where an extra piece of pipe is added between the inlet and outlet pipes on the existing boxes or send your existing exhausts to Carnewal who modify the internals and both of these would give a slightly louder/deeper sound possibly without the need to change the 'cats".

Improving the exhaust 'note'

Replace boxes

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

You are probably best to listen to a few cars with different aftermarket exhausts if you are going to change the boxes.

Improving the exhaust 'note'

Replace tone and timbre as the revs rise, throttle dependent

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

The PSE is one of the better ones, as you get a changing tone and timbre as the revs rise, throttle dependent.

Improving the exhaust 'note'

Use had never done it

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

The guy I used had never done it before but was an excellent welder..

Improving the exhaust 'note'
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.

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

  • 911uk: 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: 20261026T194705Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Is there a way of improving the exhaust sound without going down the sports exhaust route? I have a 1998 996 tip. If thats' the only option, who does a good job and what sort of money am i looking at? Based in Herts.

POST 2Original post

200cel cats could liberate a bit of extra noise.

POST 3Original post

OP, you could possibly consider the 'gundo hack" which is where an extra piece of pipe is added between the inlet and outlet pipes on the existing boxes or send your existing exhausts to Carnewal who modify the internals and both of these would give a slightly louder/deeper sound possibly without the need to change the 'cats". Alternatively, yes, there's plenty of replacment exhaust boxes which will make the sound louder etc., including some with a switchable system that you can move between loud/quiet depending on your mood/surroundings. You are probably best to listen to a few cars with different aftermarket exhausts if you are going to change the boxes.

POST 4Original post

Its an interesting point you raise though... I have a PSE on my 4S, and actually like driving it in 'quiet' mode as I can hear more of the engine, drivetrain and induction. The PSE is one of the better ones, as you get a changing tone and timbre as the revs rise, throttle dependent. Some sports exhausts are dreadful; boomy and resonant. People rave about the sound of the M3 CSL, but actually that is more about the induction noise than the exhaust.

POST 5Original post

As mentioned Gundo hack is the usual and cheapest option but listen to one thats been done first and listen to different sports boxes and 200 cell set ups as exhaust note ,tone and volume are very personal and what one loves another hates . also read reviews about cabin drone at certain revs with some exhausts. you need to decide if you want a bit more fruity or gates of hell opening volume and do you like a more deep bass sound or a more euro racing car scream sound . every person and every exhaust is slightly different :thumb:

POST 6Original post

I have a 1999, 3.4 C2 with the 'Gundo hack', I went for the moderate size one that apparently replicated the sports exhaust. I consider myself an objective person, and have driven, and heard many high end cars, but I can honestly say none have sounded as good to me as my little 3.4 after the bypass. The car will need some new bits in the near future which will likely mean I'll have to replace that section, but I will get it done again right away. It is such a smooth sound, not over loud, or attention seeking, it is a thing of beauty Exhaust sounds don't really seem to come across well over video, but this gives you an idea of the difference before and after, it is subtle, but effective. https://www.youtube.com/watch?v=lFF0Wnx9-NI&t=252s&ab_channel=carwow

POST 7Original post

The aftermarket intake hoses with resonator delete will add a bit of a louder, deeper note. I have this, but in conjunction with Miltek stainless sports silencers. https://www.ebay.co.uk/itm/124302254240?hash=item1cf0fde0a0:g:TRcAAOSwhlNfOo~2

POST 8 / ORIGINAL POSTEROriginal post

PCW (EXHAUST MODS) is booked until the end of time. Anyone else recommend someone to do a gundo hack?

POST 9Original post

Personally I found added induction noise to be a better option, although I appreciate this is subjective. As the resonator delete can be done for free though, it's a great place to start. I used the top pff a plastic milk carton and it was a perfect fit. I then spotted a K&N induction kit on eBay and snagged it for £80. Quite how they justify £400+ new though I have no idea? It fitted in just a few minutes and the sound is fantastic. I'm under no illusion that it offers any power increase though and have read it may even lose me a handful of HP? It's well worth it for the sound though.

POST 10Original post

Just Google welders locally to you.. I'm sure you will find someone fairly easily The guy I used had never done it before but was an excellent welder.. I explained what I was after and gave him photos.. £140 and a few days later the job was done.

POST 11Original post

Where do you live ? I might be able to find someone SE region

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