The kit reuses your truck's stock MAF sensor and does not require tuning or reprogramming your truck. Installation is extremely simple and only requires common hand tools and about a full hour, if this is your first time installing an intake kit. If you are currently having a lean code, it's more than likely a bad sensor, as the drop-in filters don't alter airflow that dramatically. You should, however, get your problems sorted out by your mechanic or Ford Service Center before you order.