Product Description
Upgrade your ride with the THUNDER HEART PERFORMANCE ECM engine controller 2025 Softail models from Knobtown Cycle, Kansas City’s motorcycle parts destination.
Key Features
- ThunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs in to the existing harness
- Utilizes wide-band oxygen sensors and works as a closed-loop control system to continuously self-adjust and properly tune the motorcycle’s air/fuel ratio for all riding conditions
- Easy installation: replace the factory ECM, install new oxygen sensors and harness, load the correct map for your bike, and ride
- Includes ThunderMax ECM with Auto-Tune Module, plug-in harness and two wide-band sensors, TMax software and communication USB cable, Quick-Start Easy Install and Comprehensive User’s Manual, technical support and free software and updates
- Hundreds of maps available to download for your bike (based on model, engine size, exhaust system air cleaner, pistons, cams, etc.) – load the map of your choice and the integral auto-tune will do the rest
- Improves throttle response, exhaust sound and driveability
- Rider can adjust idle speed, rev limit and speedometer calibration
- Adjustable front and rear cylinder AFR maps, ignition timing (spark) maps, and startup map
- Works with all popular exhaust systems and is compatible with high-performance camshafts
- Supports turbo, nitrous and supercharger applications
- Software program allows live monitoring, recording and examination of diagnostic codes and datalogs including number of starts, engine temperature and rpm operation
- New maps, software, firmware updates, map analysis and tech support available online at no charge
- Made in the USA
- Because of possible clearance issues, some aftermarket exhaust systems may require modifications or relocation of their O2 sensor port bungs.
- Does not require dyno tuning.
Product Specifications
- Part Number: 10204290
- Brand: THUNDER HEART PERFORMANCE
- Weight: 2.90 lbs
Expert Installation Services
Professional installation services available. Contact our Kansas City service department! Free Ship to Store!
Part Locations
| Location |
Available |
| Wisconsin (WI) |
0 |
| New York (NY) |
0 |
| Texas (TX) |
0 |
| Nevada (NV) |
0 |
| North Carolina (NC) |
0 |
| National Total |
0 |
Stock levels last updated: February 17, 2026 9:55 AM
Professional Installation Available
Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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