ThunderMax ECM Integral Auto Fuel Management System Harley Touring 2021+ Frame Integrated crankcase breathers mean no

Integrated crankcase breathers mean no additional hoses or fittings for a clean appearance

Include full-coverage heat shields

dished seating gives you a greater area of body contact for superior weight dispersion

tempered-steel inner conduit and an inner nylon liner for smooth operation and long life

ThunderMax ECM Integral Auto Fuel Management System Harley Touring 2021+ Frame Integrated crankcase breathers mean noBRAND NEW PART# 309 591 Fitment: 2021 and up Touring models *Excludes 2023. 5 Up Center Cooled Motors ThunderMax is a performance driven, award winning ECM built exclusively for EFI equipped Harley Davidson motorcycles. Designed as a stand alone replacement for the factory ECM, the 309 591 arrives fully assembled with wide band oxygen sensors, plug in harness, AutoTune module, USB communication cable, and everything you need for a straightforward