The THUNDERMAX ThunderMax Engine Control Module Kit with Integral Auto-Tune is designed for select 2021–2024 Harley-Davidson Softail motorcycles. Manufacturer part number 309-592, this kit replaces the factory ECM and connects to the existing harness. It includes an Auto-Tune module, plug-in harness, and two wide-band oxygen sensors for closed-loop control that continuously adjusts the motorcycle’s air/fuel ratio across riding conditions.
The kit includes TMax software, a communication USB cable, a Quick-Start Easy Install guide, and a Comprehensive User’s Manual. The software supports live monitoring, diagnostic code and datalog examination, and review of operating information such as starts, engine temperature, and RPM operation. Riders can adjust idle speed, rev limit, speedometer calibration, front and rear cylinder AFR maps, ignition timing maps, and startup maps.
Installation involves replacing the factory ECM, installing the new oxygen sensors and harness, loading the correct map, and riding. Hundreds of maps are available for download based on motorcycle model, engine size, exhaust system, air cleaner, pistons, cams, and other configurations. The system works with popular exhaust systems, supports high-performance camshafts, turbo, nitrous, and supercharger applications, and does not require dyno tuning. Free software, firmware updates, map analysis, and technical support are available online. Made in the USA.
Vehicle fitment includes the 2021 Harley-Davidson FLSL Softail Slim 107, 2021 Harley-Davidson FLFBS Fat Boy 114, 2021 Harley-Davidson FLSB Sport Glide 107, 2022 Harley-Davidson FXLRST Low Rider ST 117, 2023 Harley-Davidson FXBR Breakout 117, 2023 Harley-Davidson FLFBS Fat Boy 114, 2023 Harley-Davidson FLHCS Heritage Classic 114, 2023 Harley-Davidson FXBBS Street Bob 114, 2023 Harley-Davidson FXLRS Low Rider S 117, and 2024 Harley-Davidson FXLRST Low Rider ST 117. Distributor part number was not provided.
Features:
- Engine Control Module: ThunderMax ECM with Integral Auto-Tune replaces the factory ECM and plugs into the existing harness.
- Closed-Loop Tuning: Wide-band oxygen sensors continuously self-adjust the motorcycle’s air/fuel ratio for riding conditions.
- Included Components: Includes the 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.
- Map Availability: Hundreds of maps are available to download based on motorcycle model, engine size, exhaust system, air cleaner, pistons, cams, and other configurations.
- Software Functions: Supports live monitoring, diagnostic code and datalog examination, and review of starts, engine temperature, and RPM operation.
- Adjustable Settings: Allows adjustment of idle speed, rev limit, speedometer calibration, front and rear cylinder AFR maps, ignition timing maps, and startup maps.
- Application Support: Works with popular exhaust systems, supports high-performance camshafts, and supports turbo, nitrous, and supercharger applications.
- Installation: Replace the factory ECM, install the oxygen sensors and harness, load the correct map, and ride.
- Support and Updates: Online software, firmware updates, map analysis, and technical support are available at no charge.
- Vehicle Fitment: Fits select 2021–2024 Harley-Davidson Softail models listed in the product description.
- Manufacturer Part Number: 309-592.
- Origin: Made in the USA.
Fitment:
2021 Harley-Davidson FLFBS Fat Boy 114
2021 Harley-Davidson FLHC Heritage Classic 107
2021 Harley-Davidson FLHCS Heritage Classic 114
2021 Harley-Davidson FLSB Sport Glide 107
2021 Harley-Davidson FLSL Softail Slim 107
2021 Harley-Davidson FXBBS Street Bob 114
2021 Harley-Davidson FXFBS Fat Bob 114
2021 Harley-Davidson FXLRS Low Rider S 114
2021 Harley-Davidson FXST Softail Standard 107
2022 Harley-Davidson FLFBS Fat Boy 114
2022 Harley-Davidson FLHCS Heritage Classic 114
2022 Harley-Davidson FXBBS Street Bob 114
2022 Harley-Davidson FXLRS Low Rider S 117
2022 Harley-Davidson FXLRST Low Rider ST 117
2022 Harley-Davidson FXRST Low Rider El Diablo 117
2022 Harley-Davidson FXST Softail Standard 107
2022 Harley-Davidson Softail Street Bob FXBB
2023 Harley-Davidson FLFBS Fat Boy 114
2023 Harley-Davidson FLHCS Heritage Classic 114
2023 Harley-Davidson FXBBS Street Bob 114
2023 Harley-Davidson FXBR Breakout 117
2023 Harley-Davidson FXFBS Fat Bob 114
2023 Harley-Davidson FXLRS Low Rider S 117
2023 Harley-Davidson FXLRST Low Rider ST 117
2023 Harley-Davidson FXST Softail Standard 107
2024 Harley-Davidson FLFBS Fat Boy 114
2024 Harley-Davidson FLHCS Heritage Classic 114
2024 Harley-Davidson FXBBS Street Bob 114
2024 Harley-Davidson FXLRS Low Rider S 117
2024 Harley-Davidson FXLRST Low Rider ST 117
2024 Harley-Davidson FXST Softail Standard 107