alright so far my NA mods are OBX headers, CAI, and Megan Racing Muffler with straight pipes to my 2nd cat which is stock. but when i first got my car i would usually get around 180-200 miles with a half tank of gas if i was lucky with driving conditions. and now that i have all this done to my car i just actually looked at it and i have now around 310 with a quarter of a tank still left over. so i was just wondering is this normal or am i just experiencing something wonderful from the gas price gods?