ThunderMax ECM: Award-Winning Performance for EFI Harley Davidson® Motorcycles

What is ThunderMax ECM?

ThunderMax ECM is a performance engine control module (ECM) specifically designed for EFI-equipped Harley Davidson® motorcycles. This industry award-winning tuning system uses AutoTune technology combined with wide-band oxygen sensors to deliver exceptional performance and improved rideability. With ThunderMax, you get a stand-alone ECM that requires no wire-cutting or splicing, making it an easy, hassle-free upgrade for your motorcycle.

Key Features of ThunderMax ECM:

• AutoTune Technology for automatic fuel management
• Wide-band oxygen sensors to maintain perfect air-fuel ratios
• Pre-assembled and ready to install, no wire-cutting or splicing
• Real-time feedback for optimized engine performance
• Award-winning design for unmatched reliability and performance

Easy Installation for Immediate Performance Gains

ThunderMax ECM is designed for quick and easy installation, coming 100% pre-assembled and ready to install right out of the box. Simply replace your factory ECM and oxygen sensors, load your preferred map, and you’re all set for an immediate boost in performance.

Simple Installation Process:

1. Remove the stock ECM and oxygen sensors.
2. Install ThunderMax ECM and wide-band oxygen sensors.
3. Load a tuning map or use the pre-programmed basemap for instant setup.
4. Start your ride and experience improved engine performance, smoother throttle response, and better fuel efficiency.

AutoTune Technology for Real-Time Fueling Adjustments

ThunderMax ECM utilizes AutoTune technology to adjust the air-fuel ratio every 256 RPM and at every degree-and-a-half of throttle. This means your engine’s fueling is continuously optimized, ensuring a smoother, more responsive ride.

With wide-band O2 sensors constantly monitoring the air-fuel ratio, the ThunderMax ECM delivers live, real-time feedback to make automatic adjustments. This process ensures that your Harley Davidson® engine performs at its peak under all conditions. Additionally, the built-in barometric sensor allows ThunderMax to automatically adjust for changes in ambient air pressure, so you don’t need to worry about altitude or weather.

Benefits of AutoTune with ThunderMax ECM:

• Automatic fueling adjustments at every throttle position for smoother engine performance
• Real-time air-fuel ratio monitoring with wide-band O2 sensors for precise control
• Barometric sensor compensates for changes in weather and altitude automatically
• No need to "accept" adjustments—once you power off your bike, the changes are saved automatically

Fully Adjustable Tuning for a Custom Ride

ThunderMax ECM offers full adjustability with its ThunderMax tuning software, allowing you to fine-tune every aspect of your bike’s performance. Whether you're a rider who wants complete control over your fueling setup or simply prefer to use a pre-loaded map for instant tuning, ThunderMax gives you both options.

Customization Options:

• ThunderMax tuning software for advanced, detailed adjustments
• Pre-loaded basemap for quick and easy installation with automatic fueling adjustments
• Full control over your motorcycle’s air-fuel ratio and engine performance settings

Why Choose ThunderMax ECM for Your Harley Davidson®?

ThunderMax ECM is the ideal upgrade for any EFI-equipped Harley Davidson® motorcycle looking for improved performance, rideability, and fuel efficiency. Whether you're a seasoned rider looking for precise tuning or a new rider wanting an easy performance boost, ThunderMax ensures you get the best of both worlds.

Why Upgrade to ThunderMax ECM?

• Enhanced throttle response for a smoother and more powerful ride
• Real-time automatic fueling adjustments for consistent engine performance
• Simple installation with no cutting or splicing required
• Customizable tuning options to match your unique riding preferences
• Optimized engine performance with precise air-fuel ratio adjustments

Upgrade your Harley Davidson® with ThunderMax ECM and enjoy enhanced performance, better fuel efficiency, and a smoother ride every time you hit the road. Whether you’re cruising the open highway or tackling city streets, ThunderMax delivers the ultimate in engine control and rideability.

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: 309-361