Part Number: 309-588
Works with or without RDRS (Traction Control)
ThunderMax is a performance-driven, award-winning ECM built exclusively for EFI-equipped Harley-Davidson® motorcycles. Designed as a stand-alone replacement for the factory ECM, the 309-588 arrives fully assembled with wide-band oxygen sensors, plug-in harness, AutoTune m
Compatibility
2017-2020 Harley Davidson Touring models (excludes 2019 UP Trike models)
Installation
Stand-alone, no wire cutting or splicing required
Oxygen Sensors
Wideband, 100% assembled
Map Loading
Customizable with ThunderMax tuning software or basemap