Thundermax

11 products

Thundermax ECM W/ Auto Tune Kit - 21 & Newer Touring - 309-591

Thundermax

$1,115.95

Thundermax ECM W/Auto Tune System - 2021 & Newer Softail Models

Thundermax

$1,170.95

Thundermax ECM W/ Auto Tune System - 04-11 Dyna/ 10-13 Sportster - 309-485

Thundermax

$1,088.95

Thundermax ECM W/ Auto Tune System - 02-07 Touring/ 01-10 Softail/ 07- 09 Sportster - Non-Throttle By Wire - 309-460

Thundermax

$1,088.95

Thundermax ECM W/ Auto Tune System - 14-16 Touring - 309-562

Thundermax

$1,088.95

Thundermax ECM W/Auto Tune System - 02-13 V-Rod - 309-466

Thundermax

$1,088.95

Thundermax ECM W/Auto Tune - 2011 Softail

Thundermax

$1,088.95

Thundermax ECM W/Auto Tune System - 16-17 Softail / 16-17 Dyna Lowrider S/ 14-15 CVO Softail - 309-563

Thundermax

$1,088.95

Thundermax ECM W/ Auto Tune Kit - '18-'20 Softail - 309-589

Thundermax

$1,088.95

Sold out

Thundermax ECM W/Auto Tune Kit - 17 & Newer Touring WITHOUT RDRS - 309-588

Thundermax

$1,088.95

Sold out

Thundermax ECM W/ Auto Tune System - 12-17 Dyna/12-15 Softail/ 14 & Up Sportster - 309-382

Thundermax

$1,088.95

You've viewed 11 of 11 products

The ThunderMax is a cutting-edge EFI tuning system for Harley-Davidson motorcycles, designed to enhance performance, efficiency, and ride quality. Featuring a self-tuning ECU with wideband O2 sensors, ThunderMax continuously adjusts fuel and air ratios for optimal power and throttle response. Perfect for riders seeking improved performance, reliability, and customization, ThunderMax is compatible with a range of Harley-Davidson models, including Touring, Softail, and Dyna. Engineered for easy installation and user-friendly programming, ThunderMax delivers peak performance for Harley enthusiasts who demand the best.