ThunderMax for 2011 - 2013 CVO Softail® Models

ThunderMax ECM: High-Performance Tuning for EFI Harley Davidson® Motorcycles

What is ThunderMax ECM?

ThunderMax ECM is an award-winning engine control module (ECM) designed specifically for EFI-equipped Harley Davidson® motorcycles. This advanced, stand-alone tuning system uses AutoTune technology and wide-band oxygen sensors to deliver unmatched engine performance, improved rideability, and optimized fuel management. ThunderMax is perfect for Harley owners looking to upgrade their ride with precision tuning and automatic adjustments for smoother throttle response and better fuel efficiency.

Key Features of ThunderMax ECM:

• AutoTune Technology for real-time fueling adjustments
• Wide-band oxygen sensors for precise air-fuel ratio control
• No wire-cutting or splicing—easy, plug-and-play installation
• 100% pre-assembled, ready to install out of the box
• Real-time feedback for continuous optimization of engine performance

Effortless Installation: Upgrade Your Harley Davidson® with ThunderMax

ThunderMax ECM is designed for easy installation. It comes pre-assembled and is ready to install without any need for wire cutting or splicing, making it an ideal choice for those looking for a simple, hassle-free upgrade. Replacing your factory ECM and oxygen sensors is all it takes to start enjoying enhanced throttle response, smoother engine operation, and improved fuel efficiency.

Simple Installation Steps:

1. Remove the stock ECM and oxygen sensors.
2. Install ThunderMax ECM and wide-band oxygen sensors.
3. Load your preferred map or use the pre-loaded basemap.
4. Enjoy a smoother, more responsive ride with optimized engine performance.

AutoTune Technology: Real-Time Adjustments for Optimal Engine Performance

One of the standout features of the ThunderMax ECM is its AutoTune technology, which automatically adjusts fueling at every 256 RPM and every degree-and-a-half of throttle. This dynamic adjustment process ensures your Harley Davidson®'s engine runs smoothly across all speeds and throttle positions.

How AutoTune Works:

• Wide-band O2 sensors constantly monitor the air-fuel ratio to ensure optimal fueling.
• Real-time feedback to the ECM allows it to make automatic fueling adjustments, improving throttle response and fuel efficiency.
• Barometric sensor compensates for changes in atmospheric pressure, so you don’t have to adjust for weather or altitude manually.

These automatic adjustments mean smoother acceleration, more power, and a smoother engine without the need for constant tuning.

Fully Adjustable for Custom Performance: ThunderMax Tuning Software

While ThunderMax ECM offers a pre-programmed basemap for quick tuning, it’s also fully adjustable with ThunderMax tuning software. This flexibility allows you to fine-tune your engine settings for a customized riding experience, whether you want better fuel efficiency, more power, or smoother throttle response.

Customizable Features:

• ThunderMax tuning software allows for advanced adjustments to fueling, throttle response, and more.
• Pre-loaded basemaps for those who prefer a quick setup with automatic adjustments.
• Complete control over your bike’s performance, allowing you to tailor the ride to your specific needs.

Why Choose ThunderMax ECM for Your Harley Davidson®?

ThunderMax ECM is the ideal solution for EFI-equipped Harley Davidson® motorcycles looking for unmatched performance, rideability, and fuel efficiency. Whether you’re a beginner or an experienced rider, ThunderMax ensures your engine runs at its peak performance while offering simple installation and real-time tuning adjustments.

Reasons to Upgrade to ThunderMax ECM:

• Improved throttle response for a more responsive and enjoyable ride
• Automatic fueling adjustments for smoother operation across all riding conditions
• Simple, no-fuss installation with no wire cutting or splicing
• Advanced tuning options with ThunderMax software for full control over performance
• Real-time engine optimization that adjusts automatically to weather and altitude changes

Upgrade your Harley Davidson® with the ThunderMax ECM for optimized engine performance, better fuel economy, and smoother rideability. Whether you're cruising down the highway or navigating the streets, ThunderMax ensures your ride is always performing at its best, adapting automatically for peak performance with every turn of the throttle.

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: 309-363