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Message: <blockquote data-quote="dragonfigter" data-source="post: 968693" data-attributes="member: 16696">Hey,  New to the forum,  Had some problems last year with my times. I have an 04 gt with 4:10 gears, offrd pipe,borla stinger exhaust no converters, CAI, 70mm TB, underdrives, TR3650 trans.  MY times can vary greatly from 8.47 to 9.50 through out the day. My question is this car does not have a tune in it with these mods ck engine light is on due to the catless exhaust. I know having a 5sp is not helping but I know my car pretty well and when to shift. but my question is could not having a tune be a part of this. MY 60 ft is what suffers can go from a 1.70-2.1 quite frustrating. I have tried everything i know to try as far as suspension, tires (running et streets),pinion angle adjustment.  The car sounds and feels strong no drivablility issues at all the runs fell the same for the most part but the times are very inconsistant.   thanks in advance</blockquote>