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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHNew C4S

Leading reported evidence

Inspect car

Performed · outcome unconfirmed

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Performed · outcome unconfirmed · Original poster

I replaced the IMS and put a new clutch plate in at the indie shop in Austin who inspected the car when purchased, also had the brakes flushed.

New C4S
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Leading evidence: 'Inspect car' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Inspect car' (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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Install by po - they sound fantastic

Performed · outcome unconfirmed

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Reported fixes
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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 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

my car had Fabspeed exaust and headers on it, installed by PO - they sound fantastic.

New C4S

Replace thinking a lot

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 just had a really interesting conversation with a very reputable chip tuner that changed my thinking a lot.

New C4S

Use lighter, louder, higher performance mufflers

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

You can pick up a set of used, lighter, louder, higher performance mufflers for not much more.

New C4S

Recommend 996 c4s upgrades

Suggestion or failed attempt

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Unsuccessful attempts
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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

My recommended 996 C4S upgrades:

New C4S
Frequently discussed actions (7)

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

Inspect car

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 · Original poster

I replaced the IMS and put a new clutch plate in at the indie shop in Austin who inspected the car when purchased, also had the brakes flushed.

New C4S

Install by po - they sound fantastic

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

my car had Fabspeed exaust and headers on it, installed by PO - they sound fantastic.

New C4S

Recommend 996 c4s upgrades

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

My recommended 996 C4S upgrades:

New C4S

Replace ovals

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

As far as planned mods, I have ordered a Fister D exhaust from FD Motorsports as well as a set of quad exhaust tips from Maxspeed Motorsports to replace the ovals.

New C4S

Replace stock shifter - gt3 box or stock 997

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 · Original poster

Would love to replace stock shifter - GT3 box or stock 997?

New C4S

Replace thinking a lot

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 just had a really interesting conversation with a very reputable chip tuner that changed my thinking a lot.

New C4S

Use lighter, louder, higher performance mufflers

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

You can pick up a set of used, lighter, louder, higher performance mufflers for not much more.

New C4S
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.

19 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: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey there, New to the forum - Been an avid reader, but first time posting. Wish me luck! I recently purchased my first P car. A pristine 2005 996 C4S with 27k miles on it, I'm absolutely in love with it, so far. I purchased it in Austin, TX and drove it back to Los Angeles that day with my Dad. Took us just a bit over 18 hours. Anyway - wanted to get some feedback on any upgrades I should do to the car to make it more enjoyable. It's a daily driver for me around 20 miles round trip a day. It had a pioneer AVH-4100NEX system already installed, but other than that the car is completely stock. I don't think I want to do any suspension upgrade as I want to keep the ride as smoother as possible - these LA roads aren't the best maintained. Looking for all tips and tricks! I'll post some pictures when I get home tonight.

POST 2Original post

Congrats, I just got my 2005 C4S this past fall just in time to put it into winter storage. Looking forward to seeing pics and what you plan on doing to it. Since the service records that came with it left much to be desired, I'm planning on doing the IMS and RMS right away this spring. I do know it had a new clutch put in last year so I'm good there. I'll also follow my indy shops recommendations on any other needed maintenance for peace of mind. As far as planned mods, I have ordered a Fister D exhaust from FD Motorsports as well as a set of quad exhaust tips from Maxspeed Motorsports to replace the ovals. There is a pair of OEM quad tips on the parts forum I wish were available prior to my order. Also looking to powdercoat the black wheels that came on it to gold.

POST 3Original post

+996 on the Fister D exhaust - really makes the car sound awesome. Since you have relatively short round trip commute - I'd suggest driving the long way to work at least a few times a week to let it fully heat up. Quick start/stops without a full warmup aren't particularly good for your engine and oil. Cheers Charlie

POST 4Original post

Congrats Such awesome cars I vote for Exhaust for sure Makes a huge difference All depends on how deep your wallet is I personally enjoy the aural delight served up by my Tubi headers, Fabsspeed 200 cell cats and Tubi mufflers Other things I really liked doing; Switching from Bridgestones to Michelin PS2s RSS Engine mounts Ohlins RSS and tarett Suspension Bits Fabspeed carbon intake Ruf Shift **** EBC brake pads and stainless lines Gt3rs short shift kit ...... Once you start it's hard to stop

POST 5Original post

congrats, I am a little over a year into owning my 2005 C4S, had 36k miles when I got it. I did IMS first thing, these lower mileage cars seem to more prone to that issue.... my car had Fabspeed exaust and headers on it, installed by PO - they sound fantastic.

POST 6Original post

Does ims prone to low mileage car? How about a c4s 2003 triptonic over 100,000 miles?

POST 7Original post

They (IMSBearing) all can fall victim at any mileage without warning. Some more than others...Watch the videos by JR on the PCA website for more information.

POST 8Original post

Congrats & welcome! Pics! Must have been an awesome trip back to LA My recommended 996 C4S upgrades: Carbon Fiber Competition Air Intake Very easy install and picks up significant power gains. Also gives you enhanced engine bay aesthetics and more induction sound http://www.fabspeed.com/porsche-996-...intake-system/ Sport Cat X-Pipe Direct bolt-on replacement that upgrades the OEM Catalytic Converters to HJS 200 Cell Sport Cats resulting in more power/torque and a deeper, throatier exhaust tone with no Check Engine Lights. http://www.fabspeed.com/porsche-996-...verter-x-pipe/ ECU Tune Picks up approx. +15whp/15ft-lbs on a 996 C4S along with overall driveability improvements - better throttle response and a smoother, more linear powerband. http://www.fabspeed.com/porsche-996-...peed-ecu-tune/ Please let me know if you have any questions or would like forum pricing

POST 9 / ORIGINAL POSTEROriginal post

Thanks all! I replaced the IMS and put a new clutch plate in at the indie shop in Austin who inspected the car when purchased, also had the brakes flushed. The shop was TPWS Inc. Family owned and operated, only work on P cars. I'm definitely interested in doing the Fister D mod. Is there a difference between Fister and Gundo? Also want to trade out the interior lights to LED's - hard to do by yourself? Have been looking at doing the IPD replacement - Pro's/Con's? Would love to replace stock shifter - GT3 box or stock 997?

POST 10Original post

There's a good YouTube video explaining the difference between Gundo and Fister. Should help explain....

POST 11Original post

Before you spend too much of your hard earned cash on bolt on mods, call around to the knowledgeable shops and have a chat. I just had a really interesting conversation with a very reputable chip tuner that changed my thinking a lot. This shop tunes a lot of the most winning cars out there, and cautioned me about the gains suggested by plenum, (hot air) intakes and x pipes. In their experience, these mods are just as likely to rob power as they are to add it, or to move the power from a usable segment of the rpm curve to one that isn’t as useful. You need to draw your own conclusions, but it’s worth talking with the folks who have been around and done this for awhile.

POST 12Original post

Not many 2005 C4S around - welcome to the club! While this isn't a performance upgrade, one of the first things I would look after (along with IMS/RMS, water pump, AOS) is the tail light assembly, which is prone to cracking or breaking where it attaches to the body. Light Savers are highly recommended if you want to avoid dropping a tail light on the freeway... (check out this thread: https://rennlist.com/forums/996-foru...-casualty.html ) Great car, have fun!

POST 14Original post

Quotes source post: 14782489

Welcome, and I would also like to vote for a full exhaust system. I have tried almost everything exhaust and intake related. My personal opinion is a full exhaust system re-do is the best bang for the buck (performance, weight, sound). My set-up is 1) Ported OEM exhaust manifolds (would love to do headers in the future), 2) Speedtech Catless X-pipes, 3) B&B mufflers. You can't go wrong with the reputable companies (Fabspeed, Speedtech, Milltek, Tubi, etc.). There are many threads with mostly good reviews. I personally don't want to spend the time/$ modifying the heavy OEM mufflers to get more sound. You can pick up a set of used, lighter, louder, higher performance mufflers for not much more. Enjoy!

POST 15 / ORIGINAL POSTEROriginal post

Thats! While its a only a 12 mile trip each way, its in LA traffic so about 30 mins each way depending on traffic. Besides the water gauge hovering around 190 is there another indicator that the engine is fully warmed?

POST 16 / ORIGINAL POSTEROriginal post

[Image-only post; no author-written text. Original image references:] https://cimg0.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/20180131_135900_936535b557eaa9d9a25f840b5694f6f55c6acdc5.jpg https://cimg1.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/20180131_135841_149478e0b9cc055519eecf82d4874f01806503f4.jpg

POST 17Original post

IMO, there is not much point in throwing money at bolt ons for minimal (if any) gains. If you want more usable power you have to tear into the engine for more displacement.

POST 18Original post

Great find and very attractive color. @ turtle easier said than done.. I would spend money on exhaust sound even if not much gains. I have PSE with fabspeed 200 cell cats, very delicious sound with this combo. mods are addictive, careful.

POST 19Original post

Quotes source post: 14803876

Agreed, for sound it makes a great difference, for power, not so much.

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