Thundermax ECM W/Auto Tune Kit - 17 & Newer Touring WITHOUT RDRS - 309-588


Regular price $1,088.95 Save $-1,088.95
13 in stock
  • 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
  • Hundreds of maps available to download for your bike (based on 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
  • Software program allows live monitoring, recording and examination of diagnostic codes and datalogs including number of starts, engine temperature and rpm operation
  • 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
  • ThunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs in to the existing harness
  • Easy installation: replace the factory ECM, install new O² sensors and harness, load the correct map for your bike, and ride
  • New maps, software, firmware updates, map analysis and tech support available online at no charge
  • 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
  • Rider can adjust idle speed, rev limit and speedometer calibration
  • Improves throttle response, exhaust sound and driveability
  • Supports turbo, nitrous and supercharger applications
  • Does not require dyno tuning
  • Made in the U.S.A.
  • Does not fit 2020 Touring Models with Traction Control (RDRS)
  • Because of possible clearance issues, some aftermarket exhaust systems may require modifications or relocation of their O² sensor port bungs.


2020 Harley-Davidson Road Glide Limited FLTRK - -
2017-2020 Harley-Davidson Electra Glide Ultra Limited FLHTK - -
2017-2020 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG - -
2017-2020 Harley-Davidson Road King Special FLHRXS - -
2017-2020 Harley-Davidson Electra Glide Police FLHTPI - -
2017-2020 Harley-Davidson Road Glide Special FLTRXS - -
2017-2020 Harley-Davidson Street Glide Special FLHXS - -
2017-2020 Harley-Davidson Road Glide Custom FLTRX - -
2017-2020 Harley-Davidson CVO Electra Glide Ultra Limited FLHTKSE - -
2017-2020 Harley-Davidson Street Glide EFI FLHX - -
2017-2020 Harley-Davidson Road King EFI FLHR - -
2017-2020 Harley-Davidson Freewheeler FLRT - -
2017-2019 Harley-Davidson Road Glide Ultra FLTRU - -
2017-2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI - -
2017-2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL - -
Thundermax ECM W/Auto Tune Kit - 17 & Newer Touring WITHOUT RDRS - 309-588
Thundermax ECM W/Auto Tune Kit - 17 & Newer Touring WITHOUT RDRS - 309-588