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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

    $18.95
    Allows a second port for the communication cable connection to Gen II ThunderMax®, serial number 114,000 or higher. It is installed to the bike’s wiring harness at the 36-pin ECM connector. Handy for motorcycle models with tight clearances around the ECM such as Dyna®, Softail® Rocker® and 2002- 2005 V-Rod® models. Will not work on Throttle-By-Wire or Gen III Models. Included with ThunderMax® systems #309-364 and #309-385.
  3. As low as: $2,095.00

    Stop cussing that early EFI system, just replace it! Zipper’s has taken the popular ThunderMax®EFI electronics and merged it with a Delphi®-style single-throat throttle body (with the help of some specially made parts) and developed this conversion kit for bikes with the earlier systems. This kit allows you to retain the original wiring harness and gas tank, while upgrading to the same components used in Zipper’s popular high performance Muscle series EFI engine kits for Delphi®-equipped bikes. 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: $214.95

    Developed for professional ThunderMax® EFI tuners, ThunderMax® N.A.D.S. (Nitrous Assisted Dry System) gives engine builders and racers an easy-to-install “dry” nitrous performance solution. The N.A.D.S. system is 95% pre-built and requires no secondary fuel source for a clean, simple installation (ThunderMax® ECM required.) No bulky fuel pumps, fuel lines or sandwich plates required! Important Note: Intended for Use by Professional ThunderMax® Tuners Only! See Long Description Below for Additional Information. In compliance with ARB emissions laws, this product is not sold or shipped to California.
  5. 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.
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