ThunderMax Oil Cooler Fan For Harley Touring Having an issue with your M8 engine overheating ThunderMax has the perfect solution for you as they bring you their Oil Cooler Fan designed specifically for M8 engines. This fan could only take up to 15 minutes as its simple plug-n-play install saves you time to ride more! If you already have your bike equipped with a ThunderMax Ecm, all that needs to be done is install and ride. However, if you are using the stock ECM then you will need to take a trip to your local dealer to have the bike reprogrammed by flashing the Ecu. This oil cooler fan works by using engine temperature along with vehicle speed to minimize the heat and allowing the engine to run much cooler. Features: Solution for overheating M8 engines Plug-n-play installation on M8 models equipped with ThunderMax ECM Engine temp and vehicle speed work together to reduce heat Keeps your M8 engine running cool 15 minute install