ThunderMax 309-604 ECM w Auto Tune Fuel Tuner 2024 24 Helix Road & Street Glide
The new ThunderMax® system for the 2024 Road Glide Helix models is complete system designed specifically for this specific model.
This highly advanced, stand-alone tuning system utilizes proprietary Autotune technology specifically designed to interface with wide-band oxygen sensors to correct abnormal A/F readings over a wide range of throttle positions and RPM ranges to prevent over rich or lean conditions.
ThunderMax® is made in the USA and comes assembled, no wire-cutting or splicing required to install. Replaces factory ECM and narrow band oxygen sensors.
*Supports RDRS function.
- New rider programming mode feature - store up to 5 base maps and access them plus the ability to change idle speed, speedometer calibration and clear auto-tuned adjustments all without linking to a computer
- Includes ECM, 2 wide-band Bosch 5-wire oxygen sensors (18 mm) with Auto-Tune connection harness, USB communication cable, T-Max Tuner software disc and Thunder-Max quick start easy install (printable) comprehensive user manual
- Auto-map Creator feature speeds auto-tune mapping and improves the tune of any engine and exhaust pipe combination using the learned auto-tune adjustments
- Never outgrow it - easily accommodates bike changes (pipes, cams and more)
- Increased engine performance & motorcycle rideability
- Live real-time engine tuning, monitoring and recording
- Adjustable idle speed and rev limit control
- Cooler, smoother running engine
- Easy to install & simple to use
- Made in the USA
- No Dyno required - automatically tunes for riding style and riding conditions.
*Excludes 2023-2024 CVO®(VVT)
*Fitment for 2024 Roadking®, Ultra®, and Trikes® see part number 309-591
ThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology with wide-band oxygen sensors to deliver unmatched performance and rideability. ThunderMax comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!
Every degree and a half of throttle; every 256 RPM, there is a fueling point that is automatically adjusted. That means more control and a smoother running engine. With the built in barometric sensor you never have to think about ambient air changes. WideBand O2 sensors constantly read the Air Fuel Ratio and give live, real time feedback to the ECM. That means, no “accepting” the changes made to the map, once you key off the changes are written. The ThunderMax ECM is fully adjustable with our ThunderMax tuning software or can be used just by loading a basemap. The choice is yours.
