Wideband O2 sensors: Enables precise air-fuel ratio management for smoother, more consistent power
Plug-and-play installation: No wire cutting, splicing, or dyno required for quick and easy setup
Built-in barometric sensor: Automatically compensates for altitude changes to maintain performance
Fully adjustable via software: Allows custom tuning of fueling, throttle response, and more
Summarized by Shop
Part Number: 309-563
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 309-563 arrives fully assembled with wide-band oxygen sensors, plug-in harness, AutoTune module, USB communication cable, and everything
Compatibility
2016-2017 Harley-Davidson Dyna LowRider S models with EFI systems
Installation
Plug-and-play, no wire cutting or splicing required
Included components
Wideband O2 sensors, plug-in harness, autotune module, USB communication cable
Map type
Pre-loaded basemap and full software tuning capability