hey bro's. my car is now approaching 22,000 miles, yes way to many for less then a year.............hurts just thinking bout it. has anyone changed there plugs yet? the car will stay na so iridium does not seem neccassary to me. what would be the best option? aprox cost? gapping? and any pionters when changing them? the car currently is running with a aem intake, injen exaust, crawford plenum, and earthing kit. thanks for any help!