ThunderMax 2023.5-Up Touring Center Cooled Models (VVT or non-VVT)

ThunderMaxis 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!