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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

    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.
  3. Be the first to review this product

    As low as: $899.95

    ARB E.O. #'s D-644, K-001, K-001-1, K-001-2. K-001-3 ThunderMax® 50 is the most powerful, cost effective, EPA-compliant tuning device in the industry! ThunderMax® 50 provides excellent performance while meeting the tough emissions standards of California Air Resources Board. With its intelligent design, ThunderMax® 50 is continually tuning the engine, adjusting all points of the base map to meet the Air/Fuel targets. Wide-Band sensors provide feedback to the ThunderMax® AutoTune module for automatic AFR adjustments. This proven system provides excellent performance under any riding conditions. ThunderMax® 50 is the one that WORKS!
  4. 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.
  5. Be the first to review this product

    As low as: $2,425.00

    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.
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