ThunderMax ECM: The Ultimate Performance Tuning System for EFI Harley Davidson® Motorcycles

What is ThunderMax ECM?

The ThunderMax ECM is an award-winning performance engine control module designed specifically for EFI-equipped Harley Davidson® motorcycles. This high-tech, stand-alone tuning system uses AutoTune technology and wide-band oxygen sensors to deliver unmatched performance, improved throttle response, and superior rideability. ThunderMax provides everything you need to optimize your motorcycle’s fueling and performance, all in one easy-to-install package.

Key Features of ThunderMax ECM:

• Award-winning design for superior performance.
• Proprietary AutoTune technology for automatic fuel adjustments.
• Wide-band oxygen sensors for precise air-fuel ratio control.
• No wire cutting or splicing required—plug-and-play installation.
• Real-time fueling adjustments for smoother rideability and better power delivery.

Easy Installation: Plug-and-Play for Your Harley Davidson®

ThunderMax ECM is designed to be extremely easy to install, making it the perfect choice for any rider who wants to enhance their bike’s performance without the hassle of complex modifications. The system comes fully assembled, ready to install with no wire-cutting or splicing required. Just remove the factory ECM and oxygen sensors, replace them with ThunderMax components, load a map, and enjoy a more powerful, efficient ride.

ThunderMax Installation Steps:

1. Remove the stock ECM and oxygen sensors.
2. Install the ThunderMax ECM and wide-band oxygen sensors.
3. Load a pre-set map or customize your own map using ThunderMax software.
4. Start your engine, and feel the difference!

Why ThunderMax is the Best for DIY Installations:

• Plug-and-play installation—no need for professional help.
• No wire cutting or splicing—keeps your bike’s wiring intact.
• Easy-to-follow instructions for quick setup.

AutoTune Technology: Real-Time Fueling Adjustments

One of the standout features of the ThunderMax ECM is its use of AutoTune technology, which makes real-time fueling adjustments while you ride. As you accelerate, decelerate, or change altitude, the wide-band oxygen sensorsconstantly monitor your bike's air-fuel ratio and make automatic adjustments to optimize engine performance. This results in smoother acceleration, improved throttle response, and a more efficient engine.

How ThunderMax AutoTune Works:

• Automatic fueling adjustments made at every 256 RPM and every 1.5-degree throttle increment.
• Wide-band oxygen sensors provide live feedback on the air-fuel ratio.
• Barometric sensor automatically adjusts the fuel mapping based on changes in altitude or weather conditions.
• No need for manual adjustments or "accepting" changes—once you key off, the changes are permanently writtento the ECM.

This adaptive system ensures your bike runs efficiently in all conditions, keeping your engine running smoother and performing better across various riding situations.

Fully Adjustable: Customize Your Performance with ThunderMax Software

ThunderMax ECM is not just for basic performance tuning—it offers full adjustability through the ThunderMax tuning software. Whether you want to tweak fueling, adjust throttle response, or optimize for specific riding styles or conditions, ThunderMax gives you the freedom to personalize your motorcycle's performance.

ThunderMax Tuning Software Features:

• Adjustable fueling and throttle settings for precise control over your ride.
• Real-time feedback and live adjustments to ensure optimal performance.
• Customizable maps to fine-tune your Harley Davidson® for different conditions and riding styles.
• User-friendly interface that allows you to make adjustments with ease.

With ThunderMax, you can either use the pre-loaded basemap for a quick setup or dive deeper into advanced tuning to maximize your bike's potential.

Why ThunderMax ECM is the Top Choice for Harley Davidson® Riders

When it comes to EFI-equipped Harley Davidson® motorcycles, ThunderMax ECM offers the most advanced and user-friendly tuning solution on the market. Whether you're a seasoned rider or a newcomer, the ThunderMax system enhances your motorcycle’s performance by ensuring smooth power delivery, improved fuel efficiency, and more control over your engine. With AutoTune technology, wide-band oxygen sensors, and customizable tuning, ThunderMax is the most effective way to upgrade your ride.

Key Benefits of ThunderMax ECM:

• Automatic fueling adjustments for better engine efficiency.
• Improved throttle response and smoother acceleration.
• Real-time adjustments with wide-band O2 sensors.
• No wire cutting or splicing—easy DIY installation.
• Customizable performance tuning through ThunderMax software.

Upgrade Your Harley Davidson® with ThunderMax ECM Today

Take your EFI-equipped Harley Davidson® motorcycle to the next level with ThunderMax ECM. Offering seamless installation, real-time tuning, and customizable performance options, ThunderMax is the perfect upgrade for anyone looking to maximize their bike's potential. Whether you're aiming for more power, better throttle control, or superior rideability, ThunderMax provides the tools to achieve it all.

Ready to Experience the ThunderMax Difference?

Upgrade your Harley Davidson® with ThunderMax ECM today and unlock better performance, smoother rides, and improved fuel efficiency. Don't settle for less—choose ThunderMax for a more powerful and responsive motorcycle.

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: 309-382