Thundermax Engine Control Module For Harley-davidson Efi
Thundermax Engine Control Module For Harley-davidson Efi
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Estimated delivery: Feb 04 - Feb 08
About this product
About this product
Upgrade your Harley-Davidson's performance with the Thundermax Engine Control Module (ECM). This standalone replacement for your factory ECM offers improved tuning capabilities and optimized engine management, ensuring peak performance and reliability. Installation is straightforward, eliminating the need for wire cutting, splicing, or dyno tuning.
Description
The Thundermax Engine Control Module is specifically engineered for EFI-equipped Harley-Davidson motorcycles. Designed as a direct replacement for the factory ECM, this unit comes fully assembled and ready to install. It includes wide-band oxygen sensors, a plug-in harness, an AutoTune module, and a USB communication cable. With this comprehensive kit, you receive everything needed for a seamless installation without any complicated modifications. Experience enhanced throttle response, improved fuel efficiency, and optimized engine performance across various riding conditions. The AutoTune feature automatically adjusts to your riding style and environmental conditions, providing consistent and reliable performance. The Thundermax ECM offers a significant upgrade over the stock ECM, unlocking the full potential of your Harley-Davidson engine. Take control of your bike's performance and enjoy a smoother, more responsive ride.
Features & highlights
- Direct replacement for factory ECM on EFI-equipped Harley-Davidson motorcycles.
- Includes wide-band oxygen sensors for precise fuel mixture adjustments.
- AutoTune module automatically optimizes performance based on riding conditions.
- Easy installation with plug-in harness and USB communication cable.
- No wire-cutting, splicing, or dyno tuning required for installation.
- Improves throttle response, fuel efficiency, and overall engine performance.
Technical specifications
- Brand: Thundermax
- Product Name: Electronic Control Module
- Vendor Part Number: 309-605
Important to know
This ECM is designed exclusively for EFI-equipped Harley-Davidson motorcycles.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
THUNDERMAX
309-605
Electronic Control Module
Each


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.

