The THUNDERMAX ThunderMax Engine Control Module Kit with Integral Auto-Tune is designed for select 2017–2020 Harley-Davidson Touring and Trike models. Manufacturer part number 309-588, this kit replaces the factory ECM and connects to the existing harness. It includes an Auto-Tune module, plug-in harness, two wide-band sensors, TMax software, communication USB cable, Quick-Start Easy Install guide, and Comprehensive User’s Manual.
The closed-loop control system uses wide-band oxygen sensors to continuously self-adjust the motorcycle’s air/fuel ratio for changing riding conditions. Hundreds of maps are available for download based on motorcycle model, engine size, exhaust system, air cleaner, pistons, cams, and other setup details. The software supports live monitoring, recording, and examination of diagnostic codes and datalogs, including starts, engine temperature, and RPM operation.
Adjustable front- and rear-cylinder air/fuel ratio maps, ignition timing maps, and startup maps allow configuration for a range of setups. The system works with popular exhaust systems and is compatible with high-performance camshafts, while supporting turbo, nitrous, and supercharger applications. Riders can adjust idle speed, rev limit, and speedometer calibration. The kit is designed to improve throttle response, exhaust sound, and driveability without requiring dyno tuning. Free software, firmware updates, map analysis, and technical support are available online. Made in the USA.
Fitment includes the 2019 Harley-Davidson FLHTK Ultra Limited, FLHTCU Electra Glide Ultra Classic, and FLTRU Road Glide Ultra; 2020 FLHR Road King, FLHTPI Electra Glide Police, and FLHT Electra Glide Standard; 2018 FLHXSE CVO Street Glide and FLTRXSE CVO Road Glide; 2017 FLHXS Street Glide Special and FLRT Freewheeler.
Features:
- ThunderMax ECM with Integral Auto-Tune module replaces the factory ECM and connects to the existing harness
- Includes plug-in harness, two wide-band sensors, TMax software, communication USB cable, installation guide, and user manual
- Closed-loop control system continuously self-adjusts the motorcycle’s air/fuel ratio
- Hundreds of downloadable maps support different motorcycle, engine, exhaust, air cleaner, piston, and camshaft configurations
- Software provides live monitoring, diagnostic code and datalog recording, and data examination
- Adjustable front- and rear-cylinder air/fuel ratio, ignition timing, and startup maps
- Supports popular exhaust systems, high-performance camshafts, turbo, nitrous, and supercharger applications
- Allows adjustment of idle speed, rev limit, and speedometer calibration
- Designed to improve throttle response, exhaust sound, and driveability without dyno tuning
- Online software, firmware updates, map analysis, and technical support are available at no charge
- Fits select 2017–2020 Harley-Davidson Touring and Trike models
- Made in the USA
Fitment:
2017 Harley-Davidson Electra Glide Police FLHTPI
2017 Harley-Davidson FLHR Road King
2017 Harley-Davidson FLHRXS Road King Special
2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2017 Harley-Davidson FLHTCUTG Tri Glide Ultra
2017 Harley-Davidson FLHTK Ultra Limited
2017 Harley-Davidson FLHTKL Ultra Limited Low
2017 Harley-Davidson FLHTKSE CVO Limited
2017 Harley-Davidson FLHX Street Glide
2017 Harley-Davidson FLHXS Street Glide Special
2017 Harley-Davidson FLHXSE CVO Street Glide
2017 Harley-Davidson FLRT Freewheeler
2017 Harley-Davidson FLTRU Road Glide Ultra
2017 Harley-Davidson FLTRX Road Glide
2017 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson Electra Glide Police FLHTPI
2018 Harley-Davidson FLHR Road King
2018 Harley-Davidson FLHRXS Road King Special
2018 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2018 Harley-Davidson FLHTCUTG Tri Glide Ultra
2018 Harley-Davidson FLHTK Ultra Limited
2018 Harley-Davidson FLHTKL Ultra Limited Low
2018 Harley-Davidson FLHTKSE CVO Limited
2018 Harley-Davidson FLHX Street Glide
2018 Harley-Davidson FLHXS Street Glide Special
2018 Harley-Davidson FLHXSE CVO Street Glide
2018 Harley-Davidson FLRT Freewheeler
2018 Harley-Davidson FLTRU Road Glide Ultra
2018 Harley-Davidson FLTRX Road Glide
2018 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FLTRXSE CVO Road Glide
2019 Harley-Davidson Electra Glide Police FLHTPI
2019 Harley-Davidson FLHR Road King
2019 Harley-Davidson FLHRXS Road King Special
2019 Harley-Davidson FLHT Electra Glide Standard
2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2019 Harley-Davidson FLHTCUTG Tri Glide Ultra
2019 Harley-Davidson FLHTK Ultra Limited
2019 Harley-Davidson FLHTKL Ultra Limited Low
2019 Harley-Davidson FLHTKSE CVO Limited
2019 Harley-Davidson FLHX Street Glide
2019 Harley-Davidson FLHXS Street Glide Special
2019 Harley-Davidson FLHXSE CVO Street Glide
2019 Harley-Davidson FLRT Freewheeler
2019 Harley-Davidson FLTRU Road Glide Ultra
2019 Harley-Davidson FLTRX Road Glide
2019 Harley-Davidson FLTRXS Road Glide Special
2019 Harley-Davidson FLTRXSE CVO Road Glide
2020 Harley-Davidson Electra Glide Police FLHTPI
2020 Harley-Davidson FLHR Road King
2020 Harley-Davidson FLHRXS Road King Special
2020 Harley-Davidson FLHT Electra Glide Standard
2020 Harley-Davidson FLHTCUTG Tri Glide Ultra
2020 Harley-Davidson FLHTCUTGSE CVO Tri Glide
2020 Harley-Davidson FLHTK Ultra Limited
2020 Harley-Davidson FLHTKSE CVO Limited
2020 Harley-Davidson FLHX Street Glide
2020 Harley-Davidson FLHXS Street Glide Special
2020 Harley-Davidson FLHXSE CVO Street Glide
2020 Harley-Davidson FLRT Freewheeler
2020 Harley-Davidson FLTRK Road Glide Limited
2020 Harley-Davidson FLTRX Road Glide
2020 Harley-Davidson FLTRXS Road Glide Special
2020 Harley-Davidson FLTRXSE CVO Road Glide