ThunderMax with AutoTune. Fits Softail 2012-2015, Dyna 2012-2017 & Sportster 2014-2021 - Thunder Max Breakout * Top clamp and hardware

* Top clamp and hardware included

Adjustable Fit

smooth performance

* Fits XL883 Sportster 883 2004-2009

ThunderMax with AutoTune. Fits Softail 2012-2015, Dyna 2012-2017 & Sportster 2014-2021 - Thunder Max Breakout * Top clamp and hardwareThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson motorcycles. This highly advanced, stand alone tuning system utilizes proprietary AutoTune technology with wide band oxygen sensors to deliver unmatched performance and rideability. ThunderMax comes 100% assembled, ready to install with no wire cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and