Yeah tehse work for a 2.5L. I just had these installed last week. The nuts stay on the headers if you don't need the O2 bungs (make sure they are on tight as I lost both of mine). I honestly didn't notice any improvement to HP and think that I lost torque on the low end. Of course I didn't bother testing this with a real dyno. The sound is great though.
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97 Arctic Silver/Boxster Red
Carbon Everything
De-ambered
De-snorkled
Litronics
Eibach Pro Kit
Dansk Sport exhaust
Cheap Chinese headers
Silver console and bumperettes
AVIC D3
15mm H&R spacers in the rear
SSR GT3 19's
GT3 Carbon Replicas
Alcantera door panels
JL Aduio 5 channel powering Polks and Clif Designs
To do/complete:
Elemental Designs 10" subs in fiberglass enclosures behind seats
Carbon 3 spoke install with custom stereo control buttons (tiptronic wheel)
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