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Old 08-11-2009, 05:47 PM   #7
MrIcky

 
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Drives: Dodge Ram Megacab & Cobalt SS
Join Date: Sep 2008
Location: Boise
Posts: 1,536
My lernin' was that 3-5% was about the best you can expect from an intake with a few flukey exceptions and 1-3% for a cat-back exhaust. And beware any claims outside of that ballpark.
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