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ThunderMax ECM with AutoTune Closed Loop System
ThunderMax ECM with AutoTune Closed Loop System
Made in U.S.A.
46 Reviews

ThunderMax ECM with AutoTune Closed Loop System


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J&P Part #:  711-953
Mfr Part #:  309-460

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ThunderMax ECM with AutoTune Closed Loop System
ThunderMax ECM with AutoTune Closed Loop System

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ThunderMax ECM with AutoTune Closed Loop System

ThunderMax ECM with AutoTune Closed Loop System

Order in the next to ship today

Product Details


Description for ThunderMax ECM with AutoTune Closed Loop System

If you're looking for the easiest way to manage your fuel system for the best motorcycle performance, it's here. The ThunderMax ECM With AutoTune Closed Loop System is the high-tech way to manage every aspect of your fuel curve for the best throttle response available in an aftermarket fuel system manager. It mounts conveniently in place of your factory ECM and plugs into your existing harness, and uses a closed-loop control system to continuously self-adjust and properly tune the motorcycle's air/fuel ratio for all riding conditions. The ThunderMax has hundreds of maps available to download for your bike. Choose based on model, engine size, exhaust system air cleaner, pistons, cams, and more. Then, load the map of your choice and the integral auto-tune will do the rest. You can adjust the idle speed, rev limit and speedometer calibration, front and rear cylinder AFR maps, ignition timing (spark) maps, and startup maps, all without dyno tuning. It works with all popular exhaust systems, is compatible with high-performance camshafts, and supports turbo, nitrous and supercharger applications. The software allows live monitoring, recording and examination of diagnostic codes and datalogs including number of starts, engine temperature and RPM operation. Easy installation and tech support, free software and updates included. 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. Will require the use of an exhaust system with 18mm sensor bungs or head pipes must be modified to accept 18mm sensors.

• Mount in place of factory

• ECM Self-adjusting

• Hundreds of maps

• Auto-tune

• Compatible with most exhaust systems

• Use with high-performance camshafts, turbo, nitro and superchargers

• Monitor, record and analyze diagnostic codes and stats

• Free firmware, tech support and updates

• System designed to work with 18mm O2 sensors

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ThunderMax ECM with AutoTune Closed Loop System

Product Specs for ThunderMax ECM with AutoTune Closed Loop System

Manufacturer Part Number:
Open or Closed Loop:
Sold in Units:
Warehouse Part Number:
With/Without 02 Sensor:

Fitment Questions?

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  • Harley-Davidson®

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Product Notes

Important Product Notes

Not legal for sale or operation in the state of California.ÿCheck with the U.S. EPA and your respective state and local regulations to confirm emission compliance. This item cannot be returned once the package is opened. Manufacturing defects must be addressed through the manufacturer directly.

Shipping Note

Due to state regulations we cannot ship this item to the state of California.

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Ratings & Reviews

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46 Reviews
Rating Breakdown
5 stars
4 stars
3 stars
2 stars
1 star
January 3, 2022
Best thing I ever bought for my 2004 harley electra glide i transformed the bike. Runs like a champ now
December 17, 2021
I did not realize it was 11 to 14 days for processing, I wish I ordered this from fuel moto for $799 instead of $899 fuel moto also will pre program it to your bike specifications before sending it so you can just plug it in and ride.
-Scott askew
August 26, 2021
Things so powerful Now I crashed
August 26, 2021
Thunder max should be called WOOP ASS. On the way to dyno, eyes in a corner I go thru every weekend,next thing I know feels like I’m in one of those 1984 911 turbos with no traction control that killed at least two drs I knowed And one stockbroker I was in third gear using one of them caned maps for my 131 ci limited Started to accelerate out of corner and bam spun the tire drug the floor board bracket (more then usual Trouper said bike slid 192 ft I know it flipped once and took out a sign that things bad ass
July 14, 2021
He loves it. Bike is running great and easy setup
June 28, 2021
Amazing product! Bike runs so much better.
May 10, 2021
Awesome product! I was a little apprehensive picking the right map to load as I have many modifications on my engine. Once loaded it’s been running great and I’m still putting some miles on it to see how the tune goes.
March 18, 2021
well not so good on this item I got to send it back to manufacture cause it won't take a basemap and start the bike and pretty pricey to have that issue out of box new
February 2, 2021
Love ThunderMax autotuners!! I've used them in the past with great results. Yes the up front expense is a bit steep, but it gives you the freedom to change what ever you want on your bike without the hassle of bringing into a shop to get dynotuned every time you change your muffler or head pipe or cams or whatever. I will always run these on my EFI bikes.
January 26, 2021
Excellent service. Willing to price match. Saved money buying from JP cycles

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ThunderMax ECM with AutoTune Closed Loop System
ThunderMax ECM with AutoTune Closed Loop System