Touring®

ThunderMax® is complete system designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specifically designed to interface with wide-band oxygen sensors to correct abnormal A/F readings over a wide range of throttle positions and RPM ranges to prevent over rich or lean conditions. ThunderMax® is made in the USA by Thunder-Heart Performance Corp in White House, TN *Supports RDRS function on 2021 and up models.

Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.