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03-25-2007 | 01:47 PM

#33

Gringo Flyer

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From: Formosa, ARGENTINA

RE: ST 90 help

I went back and found my before and after tach readings.

14X6 MA 10,300 on 5% stock muffler
10,800 on the Jett.

13X6 APC I am getting around 11,200 with the Jett. I dont have any before prop numbers with that prop.

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