Tuner for 2024-up Bagger made by ThunderMax: The Ultimate Performance ECM for Harley Davidson® Motorcycles

Award-Winning ECM for EFI Harley Davidson® Bikes

ThunderMax is a revolutionary, industry award-winning performance ECM (Engine Control Module) specifically designed for EFI-equipped Harley Davidson® motorcycles. This state-of-the-art, stand-alone tuning system leverages proprietary AutoTune technology and wide-band oxygen sensors to deliver unmatched engine performance, efficiency, and rideability.

Easy Installation: No Wire Cutting or Splicing Required

ThunderMax ECM comes 100% assembled and ready to install—no complex wiring or splicing needed. Simply replace your factory ECM and oxygen sensors, load a custom map, and you're ready to hit the road with a smoother, more powerful ride.

Key Benefits:

• No Wire Cutting or Splicing: A hassle-free, plug-and-play solution
• Ready to Install: Fully assembled, no need for additional parts
• Immediate Performance Gains: Enhanced rideability and engine control out of the box

Advanced Fueling Control for Precision Tuning

Real-Time Adjustments for Optimized Performance

Every 1.5 degrees of throttle and every 256 RPM, ThunderMax automatically adjusts fueling points to ensure maximum performance and engine stability. This means more control over your ride and a smoother-running engine.

• Dynamic Fueling Adjustments: AutoTune technology continuously fine-tunes the air-fuel ratio for peak performance.
• Smoother Throttle Response: Automatic adjustments eliminate common fueling issues for better rideability.

Barometric Sensor for Consistent Performance

ThunderMax features an integrated barometric sensor that automatically compensates for ambient air changes, ensuring that your bike's performance remains consistent, whether you're riding in the mountains or at sea level.

Wide-Band Oxygen Sensors for Precise Tuning

The wide-band O2 sensors constantly monitor and adjust the air-fuel ratio (AFR) in real time. Unlike traditional systems, ThunderMax doesn’t require you to “accept” changes to the map. Once the key is turned off, the new settings are immediately written to the ECM, ensuring optimal fueling at all times.

Fully Customizable with ThunderMax Tuning Software

ThunderMax ECM is fully adjustable using ThunderMax Tuning Software, allowing you to fine-tune your bike’s performance according to your personal preferences. Whether you want to fine-tune every parameter or simply load a basemap for improved performance, ThunderMax gives you the flexibility to choose your tuning method.

Flexible Tuning Options:

• Full Customization: Adjust every aspect of fueling, timing, and more using ThunderMax software
• Basemap Option: Easy-to-use pre-programmed maps for quick, hassle-free setup

Why Choose ThunderMax ECM for Your Harley Davidson®?

• Award-Winning Performance: ThunderMax is a leader in motorcycle ECM technology.
• Seamless Rideability: Enjoy a smoother, more responsive engine with every ride.
• Advanced Tuning Options: Get full control over your bike’s performance with flexible tuning tools.

Upgrade your Harley Davidson® motorcycle with ThunderMax and experience the ultimate in engine performance, ease of installation, and real-time tuning.

Installation Instructions

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: 309-604

*Excludes 2023-2024 CVO®(VVT)

*Fitment for 2024 Roadking®, Ultra®, and Trikes® see part number 309-591

Fitment:

2024 FLHX Street Glide
2024 FLTRX Road Glide
2024 FLTRXP Road Glide Police