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Performance Cats vs Exhaust systems

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHPerformance Cats vs Exhaust systems

Leading reported evidence

Run performance cats

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No successful repair reported for this finding.

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Suggestion · Original poster

Is anyone running performance Cats with the stock exhaust?

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Performance Cats vs Exhaust systems
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Leading evidence: 'Run performance cats' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run performance cats' (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 · 5 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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

Run performance cats

No successful repair reported for this finding.

0
Reported fixes
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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 · Original poster

Is anyone running performance Cats with the stock exhaust?

Original post Read captured discussion
Performance Cats vs Exhaust systems
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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.

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: 20261026T083035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Is anyone running performance Cats with the stock exhaust? Are performance cats worth the money when it comes to P-cars? Do they provide more hp than an exhaust upgrade?

POST 2Original post

Cats will give more power then an exhaust upgrade. Now the real question is IMO the cats get about 10-12 HP compared to about 5 for a exhuast. Is the 7 HP worth the trouble if the cats burn out sooner or if there is a CEL.

POST 3Original post

Word to the wise, only trust the responses that can show dyno sheets of the gains.

POST 4Original post

I've heard anecdotal evidence that running sport cats offers higher horsepower at higher revs at the expense of lower horsepower at lower revs. Remember, racers generally have different requirements than about town drivers. It really depends what you are hoping to accomplish.

POST 5Original post

I have sport cats on my 02 and I do get CEL's. Right and left bank out of range for the rear O2 sensor. If I reset and take a long interstate drive it might last for a couple of days. Around town I've reset and had it back on the same day within 30 miles. They sound nice but may not be worth the trouble. For a track car it would be another story.

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