hunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs in to the existing harness. Maps, software and firmware updates available on line at no charge and you can quickly find the best map for your application using SmartLink Map Filters. With the Thundermax Auto-Tune, AFR tuning for component and exhaust changes are self-adjusting simply install, download a map and ride while Auto-Tune maintains target AFR in all conditions.