16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH997S headers
Leading reported evidence
Use 48mm piping
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1
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Leading evidence: 'Use 48mm piping' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use 48mm 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.
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16 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: 20261026T063944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I will be making a thread in the for sale section soon for these but I wanted to help out those who contribute in the 996 forum the most to benefit first!
997S headers with 18,000 miles on them.
$200 + shipping. They work for 996 and 997 C2, C4, & C4S cars.
P.S. Yes, there are performance gains with them as well.
Im located in Cincinnati, OH
I don't have a specific idea on gains. Everyone speculates however until I see a proper dyno I am not sure. I guess it also depends on if you are rocking a 3.4l or a 3.6l
To put it in perspective, to get similar gains through a plenum, its about $800
Unless you have extensive mods or live at the tracks in upper rpm's, I feel the x51's narrow your power band too much to the upper ranges based on the data I've seen.
