The Wide-Band, Closed-Loop ThunderMax EFI System is now available for all 2010 XL-model Sportsters®. The ThunderMax with AutoTune has been re-designed to fit in the new-for-2010 ECM location, making installation a breeze. The ThunderMax for 2010 XL Sportsters® includes a PigTail Harness for easy access to the communication port. Simply install, plug-In, download a base map and go for a ride! Let AutoTune fine-tune your base map to you riding habits and conditions… as you ride!