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THUNDERMAX
ThunderMax Engine Control Module Kit with Integral Auto Tune - '21-'24 Softail
Part # 1020-3515
$1,088.95
In Stock
- 60-day returns
- Free shipping over $100
- Secure checkout
CARB Compliance: B — Not legal for sale in California
Confirmed fit for 31 motorcycle configurations across Harley-Davidson, model years 2021–2024.
| Years | Make & Model |
|---|---|
| 2022 Harley-Davidson | Softail Street Bob FXBB |
| 2022 Harley-Davidson | FXRST Low Rider El Diablo 117 |
| 2022-2024 Harley-Davidson | FXLRST Low Rider ST 117 |
| 2021-2024 Harley-Davidson | FLHCS Heritage Classic 114 |
| 2021, 2023 Harley-Davidson | FXFBS Fat Bob 114 |
| 2022-2024 Harley-Davidson | FXLRS Low Rider S 117 |
| 2021-2024 Harley-Davidson | FXST Softail Standard 107 |
| 2021 Harley-Davidson | FLSL Softail Slim 107 |
| 2021 Harley-Davidson | FXLRS Low Rider S 114 |
| 2021-2024 Harley-Davidson | FXBBS Street Bob 114 |
| 2021-2024 Harley-Davidson | FLFBS Fat Boy 114 |
| 2021 Harley-Davidson | FLHC Heritage Classic 107 |
| 2021 Harley-Davidson | FLSB Sport Glide 107 |
| 2023 Harley-Davidson | FXBR Breakout 117 |
- 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
- Software program allows live monitoring, recording and examination of diagnostic codes and datalogs including number of starts, engine temperature and rpm operation
- 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
- ThunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs in to the existing harness
- Easy installation: replace the factory ECM, install new oxygen sensors and harness, load the correct map for your bike, and ride
- New maps, software, firmware updates, map analysis and tech support available online at no charge
- Adjustable front and rear cylinder AFR maps, ignition timing (spark) maps, and startup maps
- Works with all popular exhaust systems and is compatible with high-performance camshafts
- Rider can adjust idle speed, rev limit and speedometer calibration
- Improves throttle response, exhaust sound and driveability
- Supports turbo, nitrous and supercharger applications
- Does not require dyno tuning
- Made in the USA
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Overview
The THUNDERMAX 1020-3515: ThunderMax Engine Control Module Kit with Integral Auto Tune - '21-'24 Softail. Confirmed fit for 31 motorcycle configurations across Harley-Davidson, model years 2021–2024. 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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Fits these motorcycles
- Harley-Davidson Softail Street Bob FXBB
- Harley-Davidson FXRST Low Rider El Diablo 117
- Harley-Davidson FXLRST Low Rider ST 117
- Harley-Davidson FLHCS Heritage Classic 114
- Harley-Davidson FXFBS Fat Bob 114
- Harley-Davidson FXLRS Low Rider S 117
- Harley-Davidson FXST Softail Standard 107
- Harley-Davidson FLSL Softail Slim 107
- Harley-Davidson FXLRS Low Rider S 114
- Harley-Davidson FXBBS Street Bob 114
- Harley-Davidson FLFBS Fat Boy 114
- Harley-Davidson FLHC Heritage Classic 107
- Harley-Davidson FLSB Sport Glide 107
- Harley-Davidson FXBR Breakout 117