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911uk

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

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YOUR RESEARCHMods

Leading reported evidence

Replace over the years

Performed · outcome unconfirmed

No successful repair reported for this finding.

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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 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

Re the suspension, I'll have to get under for a look, no clue what's been changed over the years..

Mods
Frequently discussed work

Replace go ahead

No successful repair reported for this finding.

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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

If your suspension links have been replaced - go ahead with lowering wheel spacers etc.

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Leading evidence: 'Replace over the years' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace go ahead' (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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1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace go ahead

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

If your suspension links have been replaced - go ahead with lowering wheel spacers etc.

Mods

Replace headers

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

if you then find you want a bit more look at changing the headers but do a bit at a time so you don't make it sound not how you want.

Mods

Set lowers slightly different heights

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

when lowering decide what you want as there are 3 main options of springs if not going for coilovers and each spring set lowers slightly different heights from 15mm to 25/30mm .

Mods

Use same or similar thing

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

Speak to Alex there hes the Director but I expect him to suggest they look at the valves and probably replace them with their valves as most seem to use the same or similar thing .

Mods
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.

Replace go ahead

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

If your suspension links have been replaced - go ahead with lowering wheel spacers etc.

Mods

Replace headers

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

if you then find you want a bit more look at changing the headers but do a bit at a time so you don't make it sound not how you want.

Mods

Replace over the years

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

Re the suspension, I'll have to get under for a look, no clue what's been changed over the years..

Mods

Set lowers slightly different heights

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

when lowering decide what you want as there are 3 main options of springs if not going for coilovers and each spring set lowers slightly different heights from 15mm to 25/30mm .

Mods

Use same or similar thing

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

Speak to Alex there hes the Director but I expect him to suggest they look at the valves and probably replace them with their valves as most seem to use the same or similar thing .

Mods
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.

4 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all I'm a few months into ownership of a c4s and want to do a few mods. Hoping for some advice The car has the design tek valvetronic exhaust, firstly the switch no longer works, I assume it's set to loud and the valves push air to close? I find it too quite and want something a little louder / sportier. Any suggestions? Do 200 cell cats improve sound or soley performance? Ideally just want good rear silencers. Also I want to add spacers to widen the look. Research shows the most popular set up being 7mm fronts and 15mm rear.. any other suggestions and recommendations on where to purchase. Also do these look good on standard suspension or do people lower the car at all? Thanks

POST 2Original post

Hi Luke, re the exhaust I would suggest you have a conversation with Topgear Exhausts they are a forum sponsor and give members 10% discount off the listed prices. Speak to Alex there hes the Director but I expect him to suggest they look at the valves and probably replace them with their valves as most seem to use the same or similar thing . Topgear are a manufactor so are best placed to help you with options . I would also look at their 200cell big bore cats. the vid below is a valved exhaust with topgear 200cell big bore ,so yours would sound similar with the 200 calls. https://www.youtube.com/watch?time_continue=29&v=26fjqA6eUt8 if you then find you want a bit more look at changing the headers but do a bit at a time so you don't make it sound not how you want. Getting the stance perfect for you is often something you need to mess with a bit but the accepted std is 7mm and 15mm but if your lowering it etc you may find you need to change that a bit or you may not as stance is like exhaust note and quite personal. when lowering decide what you want as there are 3 main options of springs if not going for coilovers and each spring set lowers slightly different heights from 15mm to 25/30mm .

POST 3Original post

My advice - it the cars suspension hasn't been replaced in its life, spend the money on it and get the car handling like it is meant too - and then if you have money left over, do the wheel spacers. I am halfway through doing my rear RH links - all 5 - and still have the other 3 corners to do. I should be finished the whole set at this stage but as bolts are seized in bushes, I have to hack saw them out as many on here have done before me. It takes hours While my car didn't have any knocking noises, and seemed to handle well, every Bush on the 4 links removed so far (track rod currently seized and awaiting hack saw) has been in poor condition. The man maths i use is that if you don't do it, the person you sell to in the future may use this as a reason to discount the price. So therefore do it now and enjoy the new car feel for yourself! And it should make it easier to sell. If your suspension links have been replaced - go ahead with lowering wheel spacers etc. the standard C4S is 10mm lower than the standard C2/4 based on what I have read. Just my thoughts. :thumbs:

POST 4 / ORIGINAL POSTEROriginal post

Thanks guys, I'll give top gear a shout then, that example Sounds really nice. Re the suspension, I'll have to get under for a look, no clue what's been changed over the years.. Surprised to hear that the c4s / turbo is only 10mm lower than a standard c2/4.

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