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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9
* Replaces OEM 37707-84
* Shimming Components so they are not Bolted Down Under Tension helps to Eliminate Stress Fractures
* Smooth option
* With Performance Baffles
ThunderMax with AutoTune. Fits Softail 2011 Only - Thunder Max Luggage * Replaces OEM 37707-84ThunderMax 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
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