6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHX51 on 996 C4S: worth it?
Leading reported evidence
Replace defected engine
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.
Leading evidence: 'Replace defected engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace defected engine' (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.
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
I would only do the X51 if it were to replace a defective engine.
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.
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: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hy;
I will soon buy, in Spain (where I live), a 2004 996 C4S.
I was thinking of upgrading to the X51 pack, but some people have told me that I will win more power in the upper range of rpm's, but loose some in the low and mid range rpm's. Is that so? Is the upgrade worth the money? Is there a real, noticeable, power win?
Thanks in advance for your help.
Cheers.
If I wanted a 996 TT, I would have only spent about 7500 more than my 996 C4S. Mine happened to have the X51, but I paid for it as if it had none.
I would only do the X51 if it were to replace a defective engine. Otherwise, I would just spend the extra money for the 996 TT.
If you already have the C4S and are wondering how to make it faster, you should look into supercharging. You can get 150 hp for about the same price as the 25 horsepower from the X51. If you want to make it faster on the track you should look into suspension and tire/wheel options. The 996 turbo PSS10 suspension with 9x19ET53 + 11.5x19ET44 Champion RG5 wheels with Pirelli PZero Corsa System 325/30ZR19 asymmetric rear and 255/40ZR19 directional front tires are best for the C4S and will make you a lot faster than 150 horsepower. Then again, all four options transform the C4S into a very nice car.
Thank you all for your help!!
Had no idea the upgrade was SO expensive... Will definitely do without it. I'm hopefully selling my Bimmer in the next weeks, so I will most likely enter 2010 with a 4S in my garage.
Cheers to all.
This is a source reference. Confirm exact model applicability in the original material.
