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THUNDERMAX
Engine Control Module with Integral Auto Tune System - M8 Touring
Part # 1020-4289
$1,088.95
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Low Stock (9)
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- Free shipping over $100
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CARB Compliance: B — Not legal for sale in California
Confirmed fit for 13 motorcycle configurations across Harley-Davidson, model years 2024–2025.
| Years | Make & Model |
|---|---|
| 2024-2025 | Harley-Davidson FLHX Street Glide |
| 2024-2025 | Harley-Davidson FLHXSE CVO Street Glide |
| 2024-2025 | Harley-Davidson FLTRX Road Glide |
| 2024-2025 | Harley-Davidson FLTRXSE CVO Road Glide |
| 2024-2025 | Harley-Davidson FLTRXSTSE CVO Road Glide ST |
| 2025 | Harley-Davidson FLTRXRRSE CVO Road Glide RR |
| 2024-2025 | Harley-Davidson Road Glide Police FLTRXP |
- 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.
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Overview
The THUNDERMAX 1020-4289: Engine Control Module with Integral Auto Tune System - M8 Touring. Confirmed fit for 13 motorcycle configurations across Harley-Davidson, model years 2024–2025. Ships from Greasemoto — a veteran-owned motorcycle parts shop in Fort Worth, TX — with free U.S. shipping on orders over $100.
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