I actually gained mpg by going to my setup. Would a cold air setup work better and make more power? Yes. Does my setup work simply because of the much larger volume of air that's sucked in? Yep.
I'm getting 22mpg regularily spinning 28" tall tires around town with the drag of 6" of lift and a leaky 153,000+ mile engine. The setup works for me.
fullsink18, he wants a 16V engine setup, not 8V.