ThunderMax Engine Control Module Kit with Integral Auto Tune - '14-'17 Softail Includes ThunderMax ECM with Auto-Tune Module plug-in harness and two wide-band sensors TMax software and communication USB cable Quick-Start Easy Install and Comprehensive Users Manual technical support and free software and updates Hundreds of maps available to download for your bike based on model engine size exhaust system air cleaner pistons cams etc - load the map of your choice and the integral auto-tune will do the rest Software program allows live monitoring recording and examination of diagnostic codes and datalogs including number of starts engine temperature and rpm operation Utilizes wide-band oxygen sensors and works as a closed-loop control system to continuously self-adjust and properly tune the motorcycles airfuel ratio for all riding conditions ThunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs in to the existing harness