upgrades

i was looking into getting some upgrades but i'm new to all this... I wanted to know if I/H/E has an effect on gas consumption. and how much more power does it give your car? Are there any other upgrades I can get after those 3?

typically gains are anywhere from 5-15hp. they will decrease your MPG SLIGHTLY. it shouldn't be much of a problem. after these 3 upgrades..i'd go for some ignition upgrades. i would choose MSD for my use because they are well known and probably the best for any car. they will help out the fuel consumption.