Planet-9

Secondary Cat Delete?

Add to repair workspace

New repair projectOpen repair workspace

Original source

4 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHSecondary Cat Delete?

Leading reported evidence

Use system

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'm thinking of looking for a cheap used system on Ebay and giving it a try.
Original post Read captured discussion
Secondary Cat Delete?

Frequently discussed work

Adjust muffler piping

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
And then you could always adjust the muffler piping to get a little more out of it.
Original post Read captured discussion
Secondary Cat Delete?

Read full discussion summary

Leading evidence: 'Use system' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Adjust muffler piping' (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.

Read captured replies

1 matching discussions · 4 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Adjust muffler piping

Suggestion or failed attempt

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
And then you could always adjust the muffler piping to get a little more out of it.
Original post Read captured discussion
Secondary Cat Delete?

Replace inner piping

Suggestion or failed attempt

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
I know the Carnewal systems change the inner piping but do they also gut the secondary cats?
Original post Read captured discussion
Secondary Cat Delete?

Replace inner tube routings or adding perforated piping

Suggestion or failed attempt

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
So I've seen a few videos on Youtube of people cutting open the stock muffler and changing the inner tube routings or adding perforated piping to enhance the sound but has anyone seen a write up or video on removing the secondary cats?
Original post Read captured discussion
Secondary Cat Delete?

Frequently discussed actions (4)

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

Adjust muffler piping

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
And then you could always adjust the muffler piping to get a little more out of it.
Original post Read captured discussion
Secondary Cat Delete?

Replace inner piping

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
I know the Carnewal systems change the inner piping but do they also gut the secondary cats?
Original post Read captured discussion
Secondary Cat Delete?

Replace inner tube routings or adding perforated piping

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
So I've seen a few videos on Youtube of people cutting open the stock muffler and changing the inner tube routings or adding perforated piping to enhance the sound but has anyone seen a write up or video on removing the secondary cats?
Original post Read captured discussion
Secondary Cat Delete?

Use system

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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'm thinking of looking for a cheap used system on Ebay and giving it a try.
Original post Read captured discussion
Secondary Cat Delete?

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.

4 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

So I've seen a few videos on Youtube of people cutting open the stock muffler and changing the inner tube routings or adding perforated piping to enhance the sound but has anyone seen a write up or video on removing the secondary cats? Aftermarket exhausts don't have these cats in place and it seems they would be biggest choking point in the stock muffler. I know the Carnewal systems change the inner piping but do they also gut the secondary cats? I'm thinking of looking for a cheap used system on Ebay and giving it a try. I'd think just gutting the cats alone would give more of a sound enhancement than the piping changes in the muffler section. And then you could always adjust the muffler piping to get a little more out of it. Let me know if you've seen any write ups or videos on this. Thanks.

POST 2Original post

you might find this tread interesting https://www.planet-9.com/threads/987-2-exhaust-interior-shots-followed-by-modifications.259472/?post_id=2260599#post-2260599

POST 3Original post

Ya I read through that one almost entirely and watched the videos. His exhaust doesn't have the secondary cats where the .1 cars do so I was looking for something a little more specific to that area.

POST 4Original post

Carnewal would gut the secondary on a .1 car as part of their modification IIRC No cats in the .2 muffler.

This is a source reference. Confirm exact model applicability in the original material.