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Planet-9

987.2 stock exhaust mod similar to Carnewal GT

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8 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH987.2 stock exhaust mod similar to Carnewal GT

Leading reported evidence

Replace tiny pipe as drawn

Suggestion or failed attempt

No successful repair reported for this finding.

0
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Unsuccessful attempts
1
Discussions
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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 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

Replace the tiny pipe as drawn with red with a bigger pipping, but not connecting to the funnel looking pipe just to leave so space between them

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987.2 stock exhaust mod similar to Carnewal GT
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Leading evidence: 'Replace tiny pipe as drawn' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace tiny pipe as drawn' (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.

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1 matching discussions · 8 captured posts examined · 1 partial discussions

Compare 2 other evidence results

Use 1.5 inch hole saw in an electric drill

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

use a 1.5 inch hole saw in an electric drill to cut the little pipe at the base of the cone out.

Original post Read captured discussion
987.2 stock exhaust mod similar to Carnewal GT

Use 3 inch abrasive cutoff wheel in a

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

using a 3 inch abrasive cutoff wheel in a

Original post Read captured discussion
987.2 stock exhaust mod similar to Carnewal GT
Frequently discussed actions (3)

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

Replace tiny pipe as drawn

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

Replace the tiny pipe as drawn with red with a bigger pipping, but not connecting to the funnel looking pipe just to leave so space between them

Original post Read captured discussion
987.2 stock exhaust mod similar to Carnewal GT

Use 1.5 inch hole saw in an electric drill

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

use a 1.5 inch hole saw in an electric drill to cut the little pipe at the base of the cone out.

Original post Read captured discussion
987.2 stock exhaust mod similar to Carnewal GT

Use 3 inch abrasive cutoff wheel in a

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

using a 3 inch abrasive cutoff wheel in a

Original post Read captured discussion
987.2 stock exhaust mod similar to Carnewal GT
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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.

  • Planet-9: 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: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hi everyone, I love the sound of the Carnewal GT exhaust .. but thing is, im based in Hong Kong and the cost of shipping it over is... not very cheap as you can imagine. So im looking to modify the stock exhaust to some extend hoping to replicate that sound. Did some research and noted the following: 987.2 does not have secondary CATs, so that's out of the way (was told Carnewal removes that for Gen 1 cars) Replace the tiny pipe as drawn with red with a bigger pipping, but not connecting to the funnel looking pipe just to leave so space between them Is this all there needs to be done ? Do any holes need to be drill in any of those pipes ? Appreciate the help guys !

POST 3Original post

I did something similar. Great to begin with and very noticeable increase in sound and also a lower more aggressive note. As time went by though, the drone in the dreaded range got to be rather unbearable.... for me at least. I've since switched out to a stock R exhaust which I find a tad soft now lol. I've read mixed reviews of the carnewal . Some say no drone. Some say there's still drone. Depending on the clip I watch, the sound is meh to nice to my ears. Its the safest route for MOT reasons though.

POST 4Original post

Has anyone got Pictures of the modification Process Start to finish See how we go Thanks Mr Burns

POST 5Original post

I did this on my 987.1 . No pics but here is an explanation of what I did. Remove exaust. Engrave or scribe a straight line on top of the muffler over the weld and onto the cat chamber. ( 987.1 ). Next using a 3 inch abrasive cutoff wheel in a die grinder , cut through the middle of the weld all the way around. Cut just deep enough to get through the first layer as there is a slip fit of the cat chamber into the muffler. Youll understand when you seperate the two pieces. The line you engraved will be used to line it back up for welding. Next use a 1.5 inch hole saw in an electric drill to cut the little pipe at the base of the cone out. Go slow rpm and be patient. You need a u bend of 1.5 inch exaust tube. Steel works fine here. Cut to make two 90 degree pieces long enough to do what you see in the photo you posted. Weld that in place like the photo. Next weld the two pieces back together being careful to align the scribe line. Repeat for other side. The finishing touch here is a fabspeed x pipe tip. I absolutely love it. Hope this helps you. Lester

POST 6Original post

Lester if you put a Valve on that new piece of pipe would that be close to a PSE I’m sure it can be done

POST 8Original post

As stated above, I explained what I did to my muffler. I have no idea if it is similar to the carnwall mod. I like the way it sounds now. No drone at cruise or normal accrleration. It doesn't t get loud until you punch it, then it screams flat six.

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