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01-27-2007 | 04:44 PM

#12

yallaair

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From: Floro, NORWAY

RE: OS91FX with tune pipe

my 91 fx with the Tower muffler turned the 12.5 -12 APC at 10000 rpm and the 14-10 apc at 9300 rpm. My impression is that the 91 fx responds well to tuning

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