723729 Fits Milwaukee Eight Softail 2025 to Present

This ThunderMax EFI system with AutoTune is a purpose-built performance upgrade for fuel-injected Softail and Touring models. As a wide-band, closed-loop fuel management system, it constantly monitors and adjusts your engine's tune while you ride, ensuring peak performance even if you change your exhaust or air cleaner. It eliminates common issues like exhaust popping and backfiring while providing a crisper throttle response and easier starting. The system even gives you the ability to lower your idle speed for a cooler running engine and that classic Harley sound. For installation, ensure your exhaust is equipped with 18mm O2 sensor bungs. It is an award-winning solution that takes the guesswork out of EFI tuning for a much more enjoyable ride.