I bought one and tried it a while ago. I thought I got about 2mpg increase with stock intake, but it was really hard to tell. There are a million factors that play into fuel economy (e.g. temperature, wind speed/direction, load, tire pressure, being able to accurately calculate fuel economy, lead-foot, etc.). The factors are never the same for two tanks. When I switched to the open element intake, I found I was losing power with it and not gaining any fuel economy. So from my experience, I would say do not buy one. If you don't believe me and you want to find out for yourself PM me and I will sell you mine cheap.
I guess I am the only dumbazz in CEG that was willing to try this.
