Ram air, cat delete and aftermarket mufflers. Base tune is in my signature with a custom Power Commander dyno tune. Upper 30's mpg.
 
A custom tune would help. Breathing better helps, but it's not necessarily more efficient unless the tune is right. Lots of the tunes floating around here were written by or tweaked by a member for free, While they helped lots of folks, his remedy for elimination of decel pop was to richen the mixture, which caused poor mileage.
 
How do you go on long road trips and not know your gas mileage? Do you ever do road trips? How far between fill ups?
 
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