Since 2003, ThunderMax® has transformed the riding experience for tens of thousands of motorcycle riders with fuel injected Harley® models.
ThunderMax, the original replacement EFI system, has been at the forefront of advancing EFI technology for Harley-Davidson motorcycles, with superior engineering and manufacturing in the U.S.A. Designed with the rider in mind, ThunderMax® is the industry’s easiest and smartest EFI tuning system to use. ThunderMax® delivers outstanding performance at every throttle position, everywhere you ride, while automatically tuning for your riding style. All you need to do is install, load a map, then ThunderMax® with AutoTune does the rest!
QUICK LINKS
Feel the Difference!
Install ThunderMax® with AutoTune on an EFI Harley-Davidson® model and notice the transformation on the very first ride. ThunderMax uses smart wide-band AutoTune technology to further develop the tune for your bike’s combination. Regardless of performance changes, ThunderMax with AutoTune will tailor the base tuning map to fit your riding style, riding conditions and parts combination – automatically as you ride. You will experience these immediate benefits:
Get what you pay for! ThunderMax® with AutoTune delivers uncompromising results with just one purchase – no need for add-on boxes, additional wiring, signal modifiers, or costly re-tunes for most applications.ThunderMax® is available for all electronic fuel injected Harley-Davidson® models and grows with any future changes you make to your engine. You can add cams, an air cleaner, change exhausts, or even install a performance kit package – just download a new map and ride! The ThunderMax® base map library is included with the free ThunderMax® software and new maps are accessible via the internet 24/7.Learn How AutoTune Works!
Made in the U.S.A.
ThunderMax® with AutoTune is a product you can feel good about installing on your motorcycle.ThunderMax® is designed, engineered and manufactured in the U.S.A. by Zipper’s Performance Products and Thunder Heart Performance. ThunderMax® comes with a 3 year limited warranty.Click Here to Learn How ThunderMax is Made!
Are you ready to order? Zipper’s Performance Products Specialists are available to help you pick the best parts for your Harley-Davidson®. Our knowledgeable staff will help you meet your performance goals. Zipper’s is open Monday through Friday, from 9 AM to 6 PM EST or 24/7 by Email.
Some ThunderMax® products in this email are not for use on pollution controlled vehicles. ThunderMax® 50 is available for emissions-compliant applications. Visit Thunder-Max.com for more details.
