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ThunderMax®

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  1. Starting at $0.00
    ThunderMax® 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 specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and 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 enjoy your new ride! In compliance with ARB emissions laws, this product is not sold or shipped to California.
  2. Be the first to review this product

    $33.95
    If your laptop or PC does not have a serial port, this inexpensive adapter will instantly add a serial port to your computer for communicating between ThunderMax® EFI modules and models listed below. Part #372-002
  3. Starting at $0.00
    ThunderMax® 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 specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and 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 enjoy your new ride! In compliance with ARB emissions laws, this product is not sold or shipped to California.
  4. Be the first to review this product

    As low as: $18.95

    Allows a second USB port for the communication cable connection to the ThunderMax® Gen III (#309-460) models. It is installed to the bike’s wiring harness at the ECM connector; handy for motorcycle models with tight clearances around the ECM. Will not work on ThunderMax® TBW,Gen I & II cable-model ThunderMax®,’11-up cable Softails®, ’12-up Dyna®/Softail® models or 2014-up Sportster® systems. Included with 309-485 model ThunderMax®.
  5. Be the first to review this product

    As low as: $1,909.00

    Got your eye on a Screamin’ Eagle® or 120R H-D® engine? Zipper's ZIP KITS powered by ThunderMax® are the quick and easy way to simplify installation and power tuning on an EFI equipped big engine! In compliance with ARB emissions laws, this product is not sold or shipped to California.
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