ThunderMax Auto Tune 309-362 for 2008-2013 Harley Tri-Glide Models





If your exhaust system does not have the 18mm 02 sensor bungs required to operate this unit or if they are in the wrong place, you will need to purchase a pair of weld-in bungs below and have them welded into your existing exhaust or you will need to purchase a new header/exhaust system with the 18mm bungs.





  • Cycle Solutions Inc. has ThunderMax certified technicians on-site that install thousands of these units.
  • We will pre-load a base map for you based on the modifications you provide us for a quicker, easier installation.


  • We have advanced software that allows us to make more adjustments than the basic end user software allows.
  • We have a dyno on-site that allows us to check calibrations and make map adjustments if needed.
  • Our installation package includes professional installation by qualified technicians, NGK Iridium Spark Plugs and dyno time.

  • Dramatically improved throttle response by allowing throttle blade to open fully below 3500 RPM
  • Eliminates popping, spitting and backfiring
  • Easier starting
  • Increased Engine Performance & Motorcycle Rideability
  • Cooler, Smoother Running Engine
  • Adjustable Idle Speed & Rev Limit Control
  • Automatically Tunes for Riding Style & Riding Conditions
  • Easily Accommodates Bike Changes (Pipes, Cams, and More)
  • 100% Engineered & Made in the USA
  • 3-Year Factory Limited Warranty
ThunderMax® TBW for 2008-2013 Throttle-By-Wire H-D® Models

ThunderMax® with AutoTune is the industry’s first and only stand-alone Performance EFI Engine Management System developed specifically to meet the tuning needs of Throttle-By-Wire H-D® motorcycle owners. This highly advanced tuning system allows the user to support a wide range of performance upgrades with ease.

The all new ThunderMax® AutoTune TBW module includes all of the great performance enhancements that made the brand famous – with benefits you’ll notice immediately, including quicker throttle response, increased power and cooler operating temperatures.

Improve the performance and fuel mileage of your H-D® motorcycle without compromising over-all power output! Make adjustments to your EFI system without a master’s degree in electronics and computers!

The ThunderMax EFI System is purpose-built to deliver uncompromising performance, and you don’t have to be a rocket scientist to install it, program it or make adjustments. The ThunderMax with AutoTune is a Wide-Band, Closed-Loop system which means it continually and automatically adjusts your air-fuel ratios every time you ride, regardless of changes in ambient conditions. All you have to do is ride and enjoy!

The ThunderMax System can never be out grown… Change pipes, add cams, whatever! Just download a new map. ThunderMax software, firmware and map updates are accessible 24/7 with an internet connection.

The ThunderMax with AutoTune is made in the USA and backed by a 3-year warranty.

Exhaust Note: OE exhaust system supports 18mm ThunderMax oxygen sensors through 2009. 2010-2013 OE exhaust system uses 12mm bungs not compatible with 18mm sensors. Note that the models using 12mm sensors require exhaust systems compatible for 18mm bungs.

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