12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHeader exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
most likely the 2 piece setup
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
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.
Reported cause
You here people complaining about drone, when the culprit is most likely the 2 piece setup.
Header exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'most likely the 2 piece setup' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'most likely the 2 piece setup' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Install obx headers' (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.
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
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.
Header exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run nhp headers, mid-pipes
Performed · outcome unconfirmed
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 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 have run NHP headers, mid-pipes with secondary cats, and a sport muffler for 4 years.
Header exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use oxygen sensors
Performed · outcome unconfirmed
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 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 use all the O2 sensors but have moved them to the ports before and after the secondary cats on the mid-pipes.
Header exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
2 piece setup
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.
Suspected cause
You here people complaining about drone, when the culprit is most likely the 2 piece setup.
Header exhaust pipes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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
Hello, i have read a lot of posted topics on installing headers without cats. Its seems like a lot of peeps are running into the problems of getting dashboard warning light.And peeps having tried this and that,but still seem to get a light down the road. I really would love to put headers on my 2003 base boxster. But doing all that work and then end up with a light,would be just a waste of time. Does anyone know or have put on headers and been successful for a 2003? other then doing some harsh retuning or mods? I have a new pare got for free ,looks like the Chinese brand with only two o2 senors pug ins. I need four. thanks.
Hey pal, on our cars we have 4 cats. Two on the header and two on the secondary cat pipes (connects header to muffler). The problem with deleting the header cats is that it will throw codes. However, the secondary cats don't have any O2 sensors. They're just extra thumbs really. If you want to get rid of them I recommend buying the Fabspeed secondary cat delete pipes. Sell you're old ones here if they're in good condition and call it a day!
Where are you located in Canada?
I have a Tiptronic trans, so my choices are limited. If you have the cash, here you go, no CEL with these.
Porsche Boxster 986 / S NHP 200 Cells Exhaust Headers - Maxspeed-Motorsports
You can run catless headers on a manual and have a tune done that doesn't throw a CEL.
Forget the Fabspeed secondary cat delete pipes, get some Circuit Werks secondary cat delete pipes.
Circuit Werks Porsche Boxster 986 00 04 2 7 3 2 Test Pipe Cat Delete Testpipe TP | eBay
I have run NHP headers, mid-pipes with secondary cats, and a sport muffler for 4 years. I use all the O2 sensors but have moved them to the ports before and after the secondary cats on the mid-pipes. You have to extend the cables but I have never got a code because of the cats.
The price of them is why. $609.03 with shipping vs Circuit Werks $189.99 shipped, plus the Circuit Werks pipes have mounting points from where your secondary cats mounted.
Porsche 986 Boxster Primary Catbypass Pipes (1997-1999) - Fabspeed Motorsport
Porsche 986 Boxster Secondary Catbypass Pipes (2000-2004) - Fabspeed Motorsport
This set?
Porsche 986 Boxster 2 7L 00 04 Performance Catless Pipe Test Pipe Pipes in 50mm | eBay
I don't like that the pipes are in 2 pieces per side, they don't have the mounting points or the O2 bung holes. To me the Circuit Werks look like better quality pipes. I'm willing to give $30 more for the Circuit Werks pipes.
I don't think either set would be hard to install. You here people complaining about drone, when the culprit is most likely the 2 piece setup.
Bruce found a fix for that, but that just adds to the price of the pipes.
http://986forum.com/forums/324664-post15.html
EasySeal Exhaust Clamps: Torca EasySeal Clamps in Stainless Steel for Lap Joint Connections
