The ThunderMax EFI is a complete, stand alone ECM for all Delphi based motorcycles. This high-resolution Alpha/N-based system is the most advanced engine management system available. ThunderMax EFI simply replaces the factory O.E. system. The same technology is also available for all Magnetti-Marelli based H-D 1997-2001 motorcycles.

The ThunderMax EFI system is a joint development and distribution project between two industry leaders, Zipper's Performance Products and ThunderHeart Performance. Zipper's Performance Products is a leading developer and producer of engine kits and performance components for the H-D aftermarket industry. ThunderHeart Performance corp. engineers, designs and manufactures high technology systems and components for the motorcycle industry.

Their companies are committed to developing and improving the best engine management and fuel injection products in the industry.

Our staff is dedicated to customer support and RSSD has sold and installed more Thundemax EFI systems than anyone in the country. 

Please give us a call or send us an email for more information on the Thundermax and other Zippers products.