ThunderMax with AutoTune. Fits Touring 2008-2013. Yamaha * Fits HDI OEM Softail

* Fits HDI OEM Softail 2012-2017

* Replaces OEM # 41641-08

yet still above the bottom of the frame

883L or 883N

ThunderMax with AutoTune. Fits Touring 2008-2013. Yamaha * Fits HDI OEM SoftailThunderMax 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