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911uk

c4s exhaust

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHc4s exhaust

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Replace tone...got quieter, less growly and more 'airy'

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Performed · outcome unconfirmed · Original poster

and a few weeks ago it suddenly changed tone...got quieter, less growly and more 'airy' for want of a better description.

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c4s exhaust
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Leading evidence: 'Replace tone...got quieter, less growly and more 'airy'' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace tone...got quieter, less growly and more 'airy'' (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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Replace tone...got quieter, less growly and more 'airy'

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 · Original poster

and a few weeks ago it suddenly changed tone...got quieter, less growly and more 'airy' for want of a better description.

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c4s exhaust
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7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

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Generation: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Morning guys Slightly weird one, I did ask this a while ago on a FB group but nothing productive came from it so thought I'd try here. My '03 c4s has a TopGear exhaust on it, no PSE. and a few weeks ago it suddenly changed tone...got quieter, less growly and more 'airy' for want of a better description. And I have absolutely no idea why. I'd expect if there was an exhaust leak it would be louder not quieter, there's no change to the driving, no lights on the dash...nothing other than the sound being different. She will be going in for her annual service at RPM in a month or so but just thought I'd ask in case anyone has had anything similar, I know the TopGear exhausts are pretty common on here. thanks!

POST 2Original post

Have you contacted Top Gear? On an old Audi my exhaust went quieter but the car also lost power, part of internals had disintegrated and blocked the CAT, I pulled over and revved the car which cleared the blockage. The car ran fine and now sounded better but failed the next MOT and needed replacement CATs.

POST 3Original post

I agree with 911munKy could be a blocked cat or the internals of a muffler/silencer have have come adrift and so partially blocking the exhaust gas exit.

POST 4 / ORIGINAL POSTEROriginal post

I haven't, will drop them a message and see what they say. suspect it is hard to diagnose without seeing the car. there has been a definite change to the sound though and not only do I miss how it used to sound I would like to know why! Your point about the internals could be a good one but I'd expect to feel a power loss like you did, could only be partial I suppose!

POST 5Original post

If it was partially blocked I guess you'd only notice a drop in performance when the amount of exhaust gas escaping was sufficiently hindered and not under normal driving conditions.

POST 6 / ORIGINAL POSTEROriginal post

Yep, not sure there would be an easy way to tell mind? Suppose it is either fixable or I get the joy of finding a new exhaust system which is always good fun.

POST 7Original post

Replied to your PM. Depends on the part code, but its likely lifetime guaranteed by us.

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