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911uk

Silencers, compatability between variants

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

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YOUR RESEARCHSilencers, compatability between variants

Leading reported evidence

Install new/unused genuine 3

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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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

I fitted new/unused genuine 3.6 C4S boxes to my 3.4.

Silencers, compatability between variants
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Leading evidence: 'Install new/unused genuine 3' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install new/unused genuine 3' (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 silencers (part numbers ....3170/3270) off a c4, 2006

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
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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 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

Got the opportunity to buy some good condition used silencers (part numbers ....3170/3270) off a C4, 2006 but I have a C2, 2003.

Silencers, compatability between variants
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.

Install new/unused genuine 3

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

I fitted new/unused genuine 3.6 C4S boxes to my 3.4.

Silencers, compatability between variants

Use silencers (part numbers ....3170/3270) off a c4, 2006

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

Got the opportunity to buy some good condition used silencers (part numbers ....3170/3270) off a C4, 2006 but I have a C2, 2003.

Silencers, compatability between variants
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.

6 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Got the opportunity to buy some good condition used silencers (part numbers ....3170/3270) off a C4, 2006 but I have a C2, 2003. (part numbers 3168/3268)...(all non GT/turbo) Two questions: Will they fit? I presume so, as all the aftermarket replacements fit all the variants with a single offering. and Will they work ok? ... or is it a complete no-no because of different back pressures or things like that? I fully appreciate that the theoretical answer is no, but when you look at the number of third party suppliers selling 'universal' solutions to the non GT/Turbo model range, there must be some wiggle room. Anyone actually done this or similar?

POST 2Original post

I can say the brackets don't fit as the holes are in different places .. if you swapped the brackets over from your old silencers then all you are left with is dimensions .. i would be concerned about the pipe diameter .. if that's the same then technically they would fit . Get some measurements basically and compare to yours . Rule of thumb though .. different part numbers mean they ARE different .

POST 3Original post

I know you can fit boxes from a .2 car to a .1 car as that's exactly what I did when I got hold of the Carnewal boxes for mine. Can't speak to the specific years you mention, but I'd imagine that things would swap over without issue.

POST 4 / ORIGINAL POSTEROriginal post

Thanks for comments. By brackets, deMort, do you mean the two pairs of 'ears' on the silencers themselves...ie that these would have to be removed from the original boxes and welded onto the C4 boxes in place of whats already there? ..a bit fiddly? Please, deMort, i don't dispute your wisdom one iota, (I am awed at it) but how come the aftermarket suppliers offer 'one size fits all, (C2,C4,C4s) etc' replacements?

POST 5Original post

I fitted new/unused genuine 3.6 C4S boxes to my 3.4. I just needed to swap the tailpipes as the widebody c4s has them in different location in the bumper, easy swap. They are apparently slightly "free-er flowing" than the original 3.4 items. 997 boxes will bolt up just fine too. But you will need to chop / weld your old tailpipe attachment to them are they are different.

POST 6 / ORIGINAL POSTEROriginal post

Thanks for that wasz ... I was wondering about the tail pipes as well, as i can see they are also a different part number, but was hoping that they were a bumper positioning issue as you confirm.

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