Here is a link to a thread I did a while back on before/after dynos with Fabspeed bypass pipes:
http://986forum.com/forums/showthread.php?t=18467&page=1&pp=20&highlight=fabspeed
The 25hp claim seems more than a bit excessive to me.
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2004 550 SE #1081 of 1953 (sold)
1997 911 Targa (sold)
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