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997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

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2 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

Leading reported evidence

Replace 10mm

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
Autowerks fitted this up last week with only a minor change needed to change a 10mm to 12mm fitting for the ABS line.
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997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

Read full discussion summary

Leading evidence: 'Replace 10mm' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 10mm' (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.

Read captured replies

1 matching discussions · 2 captured posts examined · 1 partial discussions

Compare 2 other evidence results

Replace brake master cylinder

Suggestion or failed attempt

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
After chasing poor pedal feeling on my 996.2 C4S, the last link was to replace the brake master cylinder.
Original post Read captured discussion
997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

Replace needed

Suggestion or failed attempt

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
Autowerks fitted this up last week with only a minor change needed to change a 10mm to 12mm fitting for the ABS line.
Original post Read captured discussion
997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

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 10mm

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
Autowerks fitted this up last week with only a minor change needed to change a 10mm to 12mm fitting for the ABS line.
Original post Read captured discussion
997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

Replace brake master cylinder

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
After chasing poor pedal feeling on my 996.2 C4S, the last link was to replace the brake master cylinder.
Original post Read captured discussion
997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

Replace needed

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
Autowerks fitted this up last week with only a minor change needed to change a 10mm to 12mm fitting for the ABS line.
Original post Read captured discussion
997 Turbo/GT3 Brake Master Cyliner upgrade into 996 C4S

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.

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

Porsche Forum Australia: 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: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Thought some might find this useful. After chasing poor pedal feeling on my 996.2 C4S, the last link was to replace the brake master cylinder. Some internet research suggested the 997 GT3/Turbo master cylinder as the optimal replacement (Porsche part number: 997-355-91031, TRW part Number TRW-PMN166). Autowerks fitted this up last week with only a minor change needed to change a 10mm to 12mm fitting for the ABS line. The upgrade is definitely noticable and well worth the effort if it needs replacing or updating.

POST 2Original post

Lee from 9Werks TV in UK did this for his 996.1 C2 and seemed positive about it:

This is a source reference. Confirm exact model applicability in the original material.