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K&N F.I.P.K. results?


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i installed a K&N FIPK in my '01 with the Vortec 5300, and hardly noticed any performance results at the track with it. at most, it lowered my ET about .1 second and increased MPH by about .5 mph. are these things virtually unoticeable, or do they not work unless you add in a better flowing exhaust?

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