POST 1 / ORIGINAL POSTEROriginal post
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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
Discussion summary
YOUR RESEARCHFabspeed Exhaust in Classifieds Section!
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 · 5 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.
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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
POST 2Original post
What would have caused that corrosion in 5000 miles?
POST 3 / ORIGINAL POSTEROriginal post
That is an excellent question that neither I nor Joe could answer. Especially considering the system is built from stainless steel.
POST 4 / ORIGINAL POSTEROriginal post
Note: You have to look in the "Non-Member" ad section to find the Fabspeed system!
POST 5Original post
all Fabspeed 996/993 exhaust are made from T304 stainless steel. T stands for type and 304 is the type of stainless steel of which there are many many varieties. Typically super quality aftermarket exhausts are made from T304SS. For everyones information T304SS only gets surface corrosion when exposed to extreme heat and water as the carbon molecules oxidize at the surface. This is normal and customary for all T304SS when heat cycled and is not a quality or durability problem. FWIW, Porcshe used T409SS as does GM in highend cars as its cheaper and easier to work with. This is magnetic and has even more carbon content and has even more surface rust and ultimate in heavy salt and wet corrosive evironments the pipes can get very thin as has been seen on 993 inlet mufflers and older exhaust pipes.
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