Power To The Harley Sportster®

thundermaxThe Wide-Band, Closed-Loop ThunderMax EFI System is now available for all 2010 XL-model Harley 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. AutoTune fine-tune your base map to you riding habits and conditions… as you ride! See your Dealer or contact Zipper’s Performance Products or Thunder-Max. 410.579.2828.


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