ThunderMax 2021-Up Touring® Models

**Note, ThunderMax Tuner Orders are made to order. Please allow 14 to 21 business days before shipping occurs. *Excludes 2023-2024 CVO®(VVT)  and 2024-Up Center Cooled Motors *Trike Models with RDRS: Please email support@thunder-max.com prior to installation for an updated firmware file.*  ThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology with wide-band oxygen sensors to deliver unmatched performance and rideability. ThunderMax comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride! Every degree and a half of throttle; every 256 RPM, there is a fueling point that is automatically adjusted. That means more control and a smoother running engine. With the built in barometric sensor you never have to think about amb