JIMS - Forceflow Cylinder Head CoolerSmooth, streamlined design will keep your Twin Cam running cooler on those hot summer days in stop and go traffic. JIMS R&D department has come up with a serious way to drop the head temperatures by as much as 100. Although this mounts in the horn area, JIMS has designed a horn relocater hidden inside the fan housing; kit installs from horn location and is supported by center case bolt location. The fan can be installed to be turned on and off