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ThunderMax Autotune Closed Loop ECM System

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** Not Available for California Residents **

ThunderMax Autotune Closed Loop ECM System automatically analyzes and adjusts air:fuel ratios after each cylinder fire making any necessary adjustments to the injector pulse width to achieve the optimal air:fuel ratio while also compensating for variations in injectors, fuel pressure, throttle body or exhaust flow. Through the use of this sophisticated system, riders can have peace of mind knowing that each time they ride their bike is achieving optimal performance.

Best of all, whether you change exhaust systems, make engine modifications, etc. there is no need to buy a new fuel management system, simply download an updated map based on the new specifications and let ThunderMax do the rest

ThunderMax Autotune Closed Loop ECM System

  • Constantly tunes the bike based on air/fuel ratio, riding style, riding conditions, performance modifications
  • Increased horsepower
  • Improved fuel mileage without compromising over-all power output
  • Cooler operating temperatures
  • Adjustable rev limiter and idle speed
  • Enhanced throttle response
  • Supports a wide range of performance upgrades with ease
  • Supports cruise control without added downloads
  • Free module updates, base maps and software available online
  • Easy installation
  • Three (3) year factory warranty
  • Fit ’02 & newer Harley-Davidson FLH, FLT; ’09 & newer Harley-Davidson FL Trike models; ’15 & newer Harley-Davidson Freewheeler Trike models.*
  • Made in the USA

Included Hardware

  • ThunderMax Autotune Closed Loop ECM System
  • Two (2) 18mm Wide-Band Oxygen Sensors (please see below)
  • USB Communication Cable
  • SmartLink Tuning Software
  • Quick Start Guide

Special Note – ’10-’16 Touring Models

ThunderMax Autotune Closed Loop ECM System’s include wide-band, five-wire oxygen sensors that thread into 18mm x 1.5mm oxygen sensor bungs located near the engine exhaust ports which is the same size and location on ’08-’09 touring models. Starting with 2010 models, Harley-Davidson began using 12mm heated four-wire, narrow-band sensors located in front of the required catalytic converter near the transmission.  Because of this, 18mm oxygen sensor bungs will need to be added near the engine exhaust ports on ’10 & newer models utilizing factory stock head pipes or adding exhaust systems specifically designed for ’10-’16 models.  Purchasing an aftermarket exhaust system designed for ’09 touring models is recommended (utilize the same fitment on ’10 & newer models).

*Not for use in states where emission laws apply.


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