Zippers ThunderMax ECM 309-340 Open loop system allows you to take control of your EFI-equipped motorcycle Maps, software and firmware updates available on line at no charge Quickly find the best map for your application using SmartLink Map Filters Includes ThunderMax ECM, SmartLink Software and communication cable, Quick Start Easy Install and Comprehensive Users Manual, technical support and free software and updates Select and install a matching base map and enjoy the efficiency of a balanced fuel curve for throttle response like you have never imagined