15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTG exhaust system
Leading reported evidence
Replace i'm fortunate
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I'm fortunate that my back boxes and cats have been replaced.
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Suggestion
Back boxes and cats is possible you can cut stuff off and replace bolts but the manifolds when (not if) the bolts shear is going to be a whole new headache!
Leading evidence: 'Replace i'm fortunate' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace bolts' (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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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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Performed · outcome unconfirmed
I then replaced the tubes with ali tube from B&Q's autosport aisle and used stainless bolts from Ebay that with the correct shoulder length for less than the cost of a single genuine porsche rust magnet item.
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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Performed · outcome unconfirmed
I then replaced the tubes with ali tube from B&Q's autosport aisle and used stainless bolts from Ebay that with the correct shoulder length for less than the cost of a single genuine porsche rust magnet item.
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
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Suggestion
Back boxes and cats is possible you can cut stuff off and replace bolts but the manifolds when (not if) the bolts shear is going to be a whole new headache!
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
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Suggestion
However, I need to, over winter, change the manifolds.
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Replace bolts
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.
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Suggestion
Back boxes and cats is possible you can cut stuff off and replace bolts but the manifolds when (not if) the bolts shear is going to be a whole new headache!
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
Cutting off and replacing both sides was about a day to a day and a half total, and when I came to put my TG mild sport boxes and 200 cell cats on, it was a piece of cake.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I then replaced the tubes with ali tube from B&Q's autosport aisle and used stainless bolts from Ebay that with the correct shoulder length for less than the cost of a single genuine porsche rust magnet item.
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
I then replaced the tubes with ali tube from B&Q's autosport aisle and used stainless bolts from Ebay that with the correct shoulder length for less than the cost of a single genuine porsche rust magnet item.
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.
15 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
It should be a 3-4hr job, but it won't be. Rusty bolts and awkward bolt locations will drive you mad.
Although my car is a 997.2, I'm sure the experience will be very similar. Have a look at page 2 of the thread I did in relation to my exhaust swap over.
http://911uk.com/viewtopic.php?t=123776&postdays=0&postorder=asc&highlight=tubi&start=0
Good luck with which ever path you choose
I'm sending my car to TopGear for them to fit a catback new exhaust, and they say "it'll take us more than a day". I get the impression that removing all the rust fittings can be very difficult, and calls for weapons like a gas torch to get them off. Having the car in the air helps massively too.
To those DIY'ing it on their driveway - respect, and good luck.
I'm fortunate that my back boxes and cats have been replaced. However, I need to, over winter, change the manifolds. I have access to a ramp and garage but I think with these cars its a case of "picking your battles" ! I'm going to get my indy to do it, they have the jig etc so its worth paying I think. Back boxes and cats is possible you can cut stuff off and replace bolts but the manifolds when (not if) the bolts shear is going to be a whole new headache!
I've posted this before, but the issue I had (or rather the garage had) was getting the O2 sensors off, so much so that they had to leave them and buy new ones.
You can grind and cut everything else, but if you want to retain the O2 sensors then that's a different story.
BTW - 200 cell cats and mild sport boxes sound superb :thumbs:
I am only doing silencers. One side is done, one to go. 4.5hrs so far. The location of some bolts is ridiculous and they are of course rusty and round.
I ended up cutting the exhaust off the hangers, drilling out the studs and bolting the bracket back on before fitting the silencer back to the bracket with the nuts on top. Why Porsche bolt them the other way is a mystery to me.
Going to pick up a reciprocating saw on my way home tomorrow. I recon another 2-3 hours should see it done.
Working on a lift would make it a lot easier than rolling around on the floor!
If you have a good local indy I recon it should be half a day for them.
I found with mine the long bolts that go through the hangers corrode with the tubes they sit in and expand until they become one and the same mess of rust. I can't remember exactly how I got them out as I did them a couple of years ago. I then replaced the tubes with ali tube from B&Q's autosport aisle and used stainless bolts from Ebay that with the correct shoulder length for less than the cost of a single genuine porsche rust magnet item.
Cutting off and replacing both sides was about a day to a day and a half total, and when I came to put my TG mild sport boxes and 200 cell cats on, it was a piece of cake. Probably 5 hours total, working slowly.
I put the long bolts in nut up, cos I'm not a masochist.
If you've recently had new headers put in, your header to cat flange bolts will be in a good enough state to undo rather than cut. This will save you several hours at least.
If you can change your own brake pads then you're almost certainly up to this job. It's not hard, it's not precision, it's just a lot of rusted bolts and skinned knuckles (wear mechanics gloves!).
Top tip: Before you remove your bumper, tape a load of bubble wrap over it so that when you release it and it drops on the floor, you don't scratch it.
