Motorcycle performance parts and accessories for Indian, Harley Davidson motorcyles
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New! ThunderMax with AutoTune for 2010 Sportsters®


TBW ThunderMax with AutoTune EFI System


ThunderMax Cams by Red Shift for 2007-up Twin Cam®


ThunderMax with AutoTune Electronic Fuel Injection System


'01-'05 Delphi®-Style ThunderMax Throttle Body


Complete MaxFlow Air Filter Kits


ThunderMax Bench Top 12 Volt Power Supply


ThunderMax Digital Performance Speedometer


ThunderMax EFI Zip Kit for Softail Deluxe

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ThunderMax div. of Zipper's Performance
Supplier of Harley Davidson, Indian Motorcycle Performance Parts & Accessories

ThunderMax is a leading manufacture of performance parts and accessories for the motorcycle industry.  This includes products for Harley Davidson, Indian, Big Dog, and Iron Horse and many other makes and brands of motorcycles.  Products specifically include items such as:

Performance Fuel Injection: Designed to provide increase performance, ridability, fuel economy and reliability.  Available for many American V-twin motorcycles including Harley Davidson, Indian, Big Dog, Iron Horse to name a few.

Performance Ignition:  Single fire performance ignition systems with fully programmable ignition curves.  Able to meet the most rigid requirements such as for motorcycle racing while allowing the street motorcycle enthusiast the flexibility to get the most from his American Vtwin motorcycle.

New Development:  New development continues as ThunderMax designs new and exciting products for the motorcycle industry in the performance arena.  Fuel injection and electronic wiring and control systems are the areas of new innovative design and manufacture.