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ThunderMax ECM with Auto Tune Closed Loop System

Product may vary from photo(s).

Everyday Low Price: $919.99

J&P Part: 402-458

This item qualifies for free ground shipping

How Auto Tune Works

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Instructions  402-458.pdf

This product was proudly made in the USA Made In The USA

ThunderMax ECM with Auto Tune Closed Loop System

• Self-adjusting sytem combines the benefits of the ThunderMax ECM and the Auto-Tune Module for optimum performance

• Mount the ThunderMax ECM with Auto-Tune module in place of the factory ECM -- it plugs into the existing harness

• Auto-Tune adjusts itself for component and exhaust changes -- just install the new parts, download a map, and ride

• Simple adjustable rev limit, idle, speedo calibration and decel pop control settings

• System includes ThunderMax ECM and Auto-Tune Module, plug-in harness and two wide band sensors, SmartLink Software and communication cable, Quick-Start Easy Install and Basic Users Manual, technical support and free software and updates at

Product Specs

  • Manufacturer Part Number: 309-364
  • Open or Closed Loop: Closed
  • Sold in Units: Each
  • With/Without 02 Sensor: With


Harley-Davidson® Models

  • Sportster XR1200 : 2008–2010
  • Sportster XR1200X : 2011–2013

Important Product Notes

Note: Not legal for sale or operation in the state of California.  Check with the U.S. EPA and your respective state and local regulations to confirm emission compliance