in theory it would get better gas milage but we all know, at least right after u do it, ur gonna see worse cuz ur flooring it to hear the wonderful sound. check out his acitone fuel mix mod too, that will give ya some milage too.
I just cut a hole in the CAI tubing and used the stock grommet from the air box the keep the sensor in and sealed good.the reason why i didnt put the cone filter on the intake hose is that it leaves no place to put the sensor ... unless u cut a hole