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
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.