rallywheels Posted March 14, 2003 Report Share Posted March 14, 2003 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? Link to comment Share on other sites More sharing options...
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