Wideband oxygen sensors: Enable dynamic and precise air-fuel ratio control for smoother operation
Plug-and-play installation: No wire cutting, splicing, or dyno required for quick setup
Full adjustability via ThunderMax software: Allows custom tuning of maps, ignition timing, and more
Integrated data collection and diagnostics: Enables monitoring and analysis of engine metrics for deeper performance insights
Summarized by Shop
Part Number: 309-562
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 309-562 arrives fully assembled with wide-band oxygen sensors, plug-in harness, AutoTune module, USB communication cable, and everything
Compatibility
EFI Harley Davidson 2014-2016 Touring Models
Installation
Plug-and-play, no wire cutting or splicing required
O2 Sensors
Wideband, 18 mm ports
Map Support
Customizable with ThunderMax software
Data Logging
Integrated diagnostics and monitoring
Country of Manufacture
USA
Summarized by Shop
4.6
7 ratings
5
4
3
2
1
Perfect
K
Kenneth · May 12, 2026
Can't use on stock head pipes and it's a 15% restock fee to return it.