PistonHeads

991.1 C2S - Exhaust upgrade with Topgear - Page 1 - 911/Carrera GT - PistonHeads UK

Add to repair workspace

New repair projectOpen repair workspace

Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH991.1 C2S - Exhaust upgrade with Topgear - Page 1 - 911/Carrera GT - PistonHeads UK

Leading reported evidence

Use topgear exhausts

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
An indy service centre has proposed the side box deletion using Topgear exhausts.
Original post Read captured discussion
991.1 C2S - Exhaust upgrade with Topgear - Page 1 - 911/Carrera GT - PistonHeads UK

Read full discussion summary

Leading evidence: 'Use topgear exhausts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use topgear exhausts' (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 · 1 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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

Use topgear exhausts

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
An indy service centre has proposed the side box deletion using Topgear exhausts.
Original post Read captured discussion
991.1 C2S - Exhaust upgrade with Topgear - Page 1 - 911/Carrera GT - PistonHeads UK

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.

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

PistonHeads: 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All I am looking to upgrade the exhaust on my 991.1 C2S. An indy service centre has proposed the side box deletion using Topgear exhausts. https://www.topgear.co.uk/porsche-911-991-carrera-... I wanted anyone with experience of the same to share their experience in terms of noise and any noticeable performance increase. In addition any observations on the quality of Topgear’s exhaust products. Finally any advice on an alternative exhaust upgrade. Thanks

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