ThunderMax ECM with Integral Auto Tune System

2 reviews|6 answered questions

Original price was: $1,088.95.Current price is: $969.95.


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ThunderMax ECM with Integral Auto Tune System

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, and ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!

Every degree and a half of throttle, every 256 rPM, there is a fueling point that is automatically adjusted. That means more control and a smoother-running engine. With the built-in barometric sensor, you never have to think about ambient air changes. Wideband o2 sensors constantly read the air-fuel ratio and give live, real-time feedback to the ECM. That means, no “accepting” the changes made to the map, once you key off the changes are written. The Thundermax ECM is fully adjustable with our Thundermax tuning software or can be used just by loading a base map. The choice is yours.

  • Thundermax ECM with auto-tune module mounts conveniently in place of the factory ECM and plugs into the existing harness
  • Utilizes wide-band o2 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 o2 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 manual, technical support, and free software and updates
  • Hundreds of maps are available to download for your bike (based on the 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
  • Does not require dyno tuning
  • The rider can adjust idle speed, rev limit, and speedometer calibration
  • 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
  • Supports turbo, nitrous, and supercharger applications
  • The software program allows live monitoring, recording, and examination of diagnostic codes and data logs including the number of starts, engine temperature, and RPM operation
  • New maps, software, firmware updates, map analysis, and tech support are available online at no charge
  • Made in the U.S.A..

Because of possible clearance issues, some aftermarket exhaust systems may require modifications or relocation of their o2 sensor port bungs
*1* Not for use on models with traction control
*2* Will require the use of an exhaust system with 18 mm sensor bungs or head pipes that must be modified to accept 18 mm sensors

This product is intended for “race-ready” vehicles only and is not for sale or use on vehicles otherwise subject to emission control requirements. In the state of California, this product should not be used on any vehicle that is registered for use on public roads. Please view the Thundermax 50 application guide for “street-approved” and CARB-compliant products. ***THUNDERMAX EMISSIONS NOTICE***

Weight N/A
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Based on 2 reviews
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  1. fleet korrell

    Haven’t used it yet as I was waiting on parts to finish my secondcam and oil pump change but have not heard anything but good reviews

    Image #1 from fleet korrell
    (0) (0)
  2. Anonymous

    EXACTLY WHAT I WANTED. Seller was awesome!!!!

    (0) (0)
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Q & A

What ECM module part number will fit for a 2009 Harley Davidson 1200 Sportster xl custom Joe asked on January 20, 2024

Please choose Model 01-10 FXST/FLST, 02-07 FLHT/FLHR/FLTR/FLHX, 07-09 XL

Joe Skinner answered on January 21, 2024 store manager
(0) (0)
Which tuner will work with a 2004 Fatboy EFI? seasn asked on April 13, 2023

Choose model 01-10 FXST/FLST, 02-07 FLHT/FLHR/FLTR/FLHX, 07-09 XL Part #309-460

Fuel Row answered on April 13, 2023
(0) (0)
Which model is for a 2016 Harley Davidson road glide special illya asked on March 25, 2023

This is the correct model. 14-16 FLHT/FLHR/FLHX/FLTR, 14-16 Trike *2*

Fuel Row answered on March 27, 2023
(0) (0)
Will this thundermax closed tuner work with my 2005 softail Deluxe FLSTNI ? I think the part # 309-361 I just installed the S&S hot set up 124 ci with cams gear drive, flywheel jugs and pistons/rings and ect. Looking for the best tuner to complete this monster 88 turned 124 . Thanks for your help in advance. Bradley McGrath asked on March 22, 2023

You will want to choose 01-10 FXST/FLST, 02-07 FLHT/FLHR/FLTR/FLHX, 07-09 XL which is part# 309-460

Fuel Row answered on March 24, 2023
(0) (0)
Will this work on a 2020 street glide special? Eithen Crespo asked on March 6, 2023

Yes, SKU: 309-588 is what you need.

Fuel Row answered on March 6, 2023
(0) (0)

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