ThunderMax Performance ECM: 2021 - up Harley Davidson® Baggers.
Boost Your Harley’s Performance with ThunderMax ECM
ThunderMax is an industry award-winning performance ECM designed specifically for EFI-equipped Harley Davidson® motorcycles. This cutting-edge, stand-alone tuning system enhances your bike's rideability and power using proprietary AutoTune technology and wide-band oxygen sensors. Whether you’re a weekend rider or a seasoned Harley enthusiast, ThunderMax guarantees unmatched performance and ease of installation.
Key Features of ThunderMax ECM
AutoTune Technology for Precision Fueling
ThunderMax’s AutoTune technology uses wide-band oxygen sensors to continuously adjust fueling points every 1.5 degrees of throttle and every 256 RPM. This results in a smoother-running engine with precise control over your bike’s fuel map, ensuring peak performance at all times.
Easy Installation with No Wire Cutting
ThunderMax is delivered 100% assembled and ready to install. Simply replace your factory ECM and oxygen sensors with ThunderMax, load a map, and you’re set! No wire-cutting or splicing is required, making it an ideal solution for both DIY mechanics and professional installers.
Real-Time Feedback for Optimal Performance
The built-in barometric sensor adjusts for ambient air changes, ensuring consistent performance no matter the conditions. Wide-band O2 sensors provide live, real-time feedback to the ECM, so changes are immediately written to the system once the key is turned off—no need for manual acceptance.
Full Customization with ThunderMax Tuning Software
ThunderMax is fully adjustable using the ThunderMax tuning software, allowing you to fine-tune the system to your exact preferences. Alternatively, you can simply load a pre-configured basemap and hit the road. The choice is yours, giving you ultimate flexibility in how you tune your Harley.
Why Choose ThunderMax for Your Harley Davidson®?
With ThunderMax, you get a highly advanced, reliable tuning system that ensures your Harley runs smoothly, efficiently, and powerfully. Whether you’re looking for simple installation or full customization, ThunderMax is the perfect choice for serious riders who want the best performance and rideability from their EFI Harley Davidson® motorcycles.
Emissions Notice
This product is intended for "RACE READY" vehicles only and is not for sale or use on vehicles otherwise subject to emission control requirements. In the state of California, this product should not be used on any vehicle that is registered for use on public roads. Please view the ThunderMax 50 application guide for "STREET APPROVED" & ARB compliant products.
Part Number: 309-591
*Excludes 2023-2024 CVO®(VVT) and 2024-Up Center Cooled Motors
*Trike Models with RDRS: Please email support@thunder-max.com prior to installation for an updated firmware file.*
