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996 Turbo 74mm Plenum Upgrade

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

Discussion summary

YOUR RESEARCH996 Turbo 74mm Plenum Upgrade

Leading reported evidence

Replace tb or y pipe

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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

What I meant to say or imply was - the stock Carrera throttle body is 74mm - so if you buy the 74mm plenum, you won't need to change the TB or Y pipe...

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade
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Leading evidence: 'Replace tb or y pipe' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace tb or y pipe' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Use factory y pipe or will

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

can you use the factory Y pipe or will that have to be upgraded as well?

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade

Use original tb or a 74mm unit

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

looks like there is a 68mm upgrade so you can use your original TB or a 74MM unit which would require the larger TB.

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade

Use reducer if so

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

do you need to use a reducer if so?

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade
Frequently discussed actions (4)

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

Replace tb or y pipe

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

What I meant to say or imply was - the stock Carrera throttle body is 74mm - so if you buy the 74mm plenum, you won't need to change the TB or Y pipe...

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade

Use factory y pipe or will

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

can you use the factory Y pipe or will that have to be upgraded as well?

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade

Use original tb or a 74mm unit

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

looks like there is a 68mm upgrade so you can use your original TB or a 74MM unit which would require the larger TB.

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade

Use reducer if so

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

do you need to use a reducer if so?

Original post Read captured discussion
996 Turbo 74mm Plenum Upgrade
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.

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

  • Rennlist: 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am considering installing the 74mm IPD Plenum along with the matching 74mm bosch throttle body. can you use the factory Y pipe or will that have to be upgraded as well? do you need to use a reducer if so? My car currently has an EPL tune and a maxspeed 200cell cat exhaust. I plan on adding along with the plenum and throttle body....switzer headers, 3.5"intercoolers, silicone boost hoses on both sides of intercoolers, upgraded air intake box/filter, silicone F-pipe, billet diverter valves, new spark plugs and 997 coil packs. This is all in preparation for adding k-16 billet hybrid turbos, and I want to re-tune when I install the new turbos in the future.

POST 2Original post

I think the turbo throttle body is 82mm... IPD plenum would be 82mm as well...

POST 3Original post

My understanding is the 996 turbo had a 68mm TB, IPD's as well http://www.ipdplenums.com/products/p...6-turbosx50gt2 looks like there is a 68mm upgrade so you can use your original TB or a 74MM unit which would require the larger TB.

POST 4Original post

What I meant to say or imply was - the stock Carrera throttle body is 74mm - so if you buy the 74mm plenum, you won't need to change the TB or Y pipe...

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