THUNDERMAX Engine Control Module with Integral Auto Tune System - 2024+ Touring Models - 309-605
Engine Control Module with Integral Auto Tune System - 2024+ M8 Touring
- 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
Fitment Note: Fitment for 2023-Up Roadking, 2023-2024 Ultra, and 2023-Up Trike use part number 309-591
Fits Both VVT & Non-VVT Models
ThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology with wide-band oxygen sensors to deliver unmatched performance and rideability. ThunderMax comes 100% assembled, ready to in stall with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!
* Upgrade on OEM # 41001351
Tech Tips:-
* Fits BOTH Air & Water Cooled Models
* Exhaust Note: On 2010up Touring models, the OEM exhaust system has 12mm o2 ports. The factory 12mm exhaust system is not compatible with the 18mm ThunderMax Wide Band oxygen sensors. Models with 12mm ports require the purchase an aftermarket exhaust system wi th 18mm ports.
eg. 200100, 6255DBRB,
Fitment Guide
| 2025 | Harley-Davidson | FLTRXSTSE CVO Road Glide ST | - | - |
| 2025 | Harley-Davidson | FLTRXRRSE CVO Road Glide RR | - | - |
| 2024-2025 | Harley-Davidson | FLTRX Road Glide | - | - |
| 2024-2025 | Harley-Davidson | FLHX Street Glide | - | - |
| 2023-2025 | Harley-Davidson | FLHXSE CVO Street Glide
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| 2023-2025 | Harley-Davidson | FLTRXSE CVO Road Glide
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Delivery Info
Please Note - Warehouse Locations For This Part -
THUNDERMAX Engine Control Module with Integral Auto Tune System - 2024+ Touring Models - 309-605
Gold Coast Warehouse- If your parts are in stock at our Gold Coast warehouse at the time of order, they will be shipped within 24hrs.
Supplier Warehouse - 2-3 Week Delivery- If your parts are located at our Supplier Warehouse, Delivery ETA is approx 2-3 weeks, as the parts are likely coming from our USA supplier warehouse. We will notify you once we receive it in Gold Coast warehouse and its on its way to you.