POST 1 / ORIGINAL POSTEROriginal post
996.1 2001 I have a sports exhaust, not sure which one but a non switched I assume. The flaps have been wired open so it is very noisy all the time. Can I simply un wire them and let them flap??
8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
Discussion summary
YOUR RESEARCHVery noisy exhaust - flaps wired up
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 8 captured posts examined · 0 partial discussions
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.
8 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: 20261027T173940Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
POST 2Original post
Assuming you are referring to the valves in a switchable/valved exhaust then as you have a non-valved exhaust you have no valves you can alter. In addition valved exhausts don't work that way anyway... Best bet is to fit some alternative backboxes more to you taste aurally!
POST 3 / ORIGINAL POSTEROriginal post
Not sure what exhaust l have as l have only just bought the car. No switch inside the car so l assumed there was a version that simply had flaps in the pipes somewhere, so at low revs the sound would be deadened and at high revs the flaps get pushed open with the air flow. Do you know what the normal back boxes were on these?
POST 4Original post
When you say the flaps have been wired open, what to you mean? Can you see something - if so can you upload a pic?
POST 5 / ORIGINAL POSTEROriginal post
I can try, l pick the car up tomorrow after a water pump fitting.
POST 6Original post
I think the error you have made is assuming that all 996s have flaps of some description. That is not the case, I think you've almost certainly just got a noisy sports backbox. Easy enough to swap out for a quieter one - top gear are a good place to get a reasonably cheap replacement which is good quality.
POST 7 / ORIGINAL POSTEROriginal post
Thanks l think l will try and put it back to ‘normal’. I will give them a try.
POST 8Original post
Quotes source post: 2712960
Miltek back box on my 996C2 sounded great under the load only £1K. Cat 100 or 200 cells would of made it perfect, a bit louder. My Boxster S had a ridiculously loud back box droning all the time. Be wary of cheap exhausts, drone city! Hence on my 997TT I bought a Kline @ £4K!
This is a source reference. Confirm exact model applicability in the original material.