Planet-9

MIlltek Cat Back ONLY!!

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHMIlltek Cat Back ONLY!!

Leading reported evidence

Run borla look

Suggestion or failed attempt

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Unsuccessful attempts: 1
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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

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Suggestion
Milltek headers were a little longer run, Borla look to be longer still, but haven't tested those yet.
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MIlltek Cat Back ONLY!!

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Leading evidence: 'Run borla look' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run borla look' (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.

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1 matching discussions · 6 captured posts examined · 1 partial discussions

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Run headers

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
Are the Capristo headers the short run or long run headers?
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Run headers will increase torque

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
Your assumptions about headers are incorrect, header performance depends on the design, for example short run headers will typically not increase torque but will increase hp at higher ends, whereas longer run headers will increase torque but sacrifice some high end hp.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Run headers will typically not increase torque

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
Your assumptions about headers are incorrect, header performance depends on the design, for example short run headers will typically not increase torque but will increase hp at higher ends, whereas longer run headers will increase torque but sacrifice some high end hp.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Test headers add

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No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
From my own testing headers add from 8-10hp if done right and a catback alone typically adds 8-12 again if done right.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Frequently discussed actions (6)

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Run borla look

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Milltek headers were a little longer run, Borla look to be longer still, but haven't tested those yet.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Run headers

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
Are the Capristo headers the short run or long run headers?
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Run headers will increase torque

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
Your assumptions about headers are incorrect, header performance depends on the design, for example short run headers will typically not increase torque but will increase hp at higher ends, whereas longer run headers will increase torque but sacrifice some high end hp.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Run headers will typically not increase torque

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
Your assumptions about headers are incorrect, header performance depends on the design, for example short run headers will typically not increase torque but will increase hp at higher ends, whereas longer run headers will increase torque but sacrifice some high end hp.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Test headers add

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
From my own testing headers add from 8-10hp if done right and a catback alone typically adds 8-12 again if done right.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

Use adjustable flaps in the exhaust system

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Reported fixes: 0
Unsuccessful attempts: 1
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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
It uses adjustable flaps in the exhaust system to tune the sound at load/RPM so you can get that high throttle scream, with the drone-free low-end.
Original post Read captured discussion
MIlltek Cat Back ONLY!!

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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.

6 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: 20261026T120458Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Since I have no experience with Mods on the Cayman. Has anyone had any problems with the Milltek Cat Back? Obviously I have seen the posts regarding the headers. It appears to me the only difference the headers make is HP on the top end and nothing noticable on the bottom. Has anyone compared Cat Backs and is there anything better than the Milltek? Is this a Mod worth doing? Thanks in advance for your responses

POST 2Original post

Depends on what you are after. I have the Milltek, and its nice, but a bit quiet. It has a little cabin drone in low RPMs under load, but not too bad. The tips and system look great on the car. The other systems are louder, but the drone may drive you crazy (Im basing this on what I have read here) The Capristo, however, gives you the best of both worlds. It uses adjustable flaps in the exhaust system to tune the sound at load/RPM so you can get that high throttle scream, with the drone-free low-end.

POST 3Original post

Does the Cat Back only, make a large difference in performance?

POST 4Original post

Your assumptions about headers are incorrect, header performance depends on the design, for example short run headers will typically not increase torque but will increase hp at higher ends, whereas longer run headers will increase torque but sacrifice some high end hp. From my own testing headers add from 8-10hp if done right and a catback alone typically adds 8-12 again if done right. Combos come in around 20-22 if done right, some exceed that (Capristo) and some don't, again all depends on the system. You should always dyno before and after if you want to know what YOUR gains are, not "advertised" gains.

POST 5Original post

Are the Capristo headers the short run or long run headers?

POST 6Original post

Short, but I still get some torque gains, at least better than say a torque loss. Milltek headers were a little longer run, Borla look to be longer still, but haven't tested those yet.

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