Thundermax oil cooler fan FLH/T17-UP

The ThunderMax oil cooler fan is the answer to overheating on oil cooled Milwaukee Eight engines in Touring models. The fan works by using the engine temperature and vehicle speed sensor to reduce heat and keep your Milwaukee Eight engine running cool. Installs in about 15 minutes and plugs directly into a ThunderMax ECM. Motorcycles with the stock ECM require flashing the ECM with the Harley Digital Technician or Diag-4-Bike Version 19.1 or later.