After reading all the threads it seems like it is uncertain as to whether or not adding an intake and exhaust will improve MPG. If something would, people would all agree and say so. For example, no one disputes that the Sylvania Silver Star Bulbs are brighter than stock, that the intake systems make a throatier sound, that aftermarket stereos sound better than stock, etc.
So I probably will not make any changes as there is not consensus as to these modifications improving MPG and I feel that if these items truly did so, people would agree more.
Thanks for everyone's help!
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