I installed Ultra cooler on my 2003 Ultra Classic FLHTCUI to replace another brand that was not working for me! I am glad I did, dropped temperature dramatically! I installed the FLO oil filter it raised my oil pressure at idle hot from 10 psi to 32 psi. That is even extra protection since the FLO filter flows oil 7 times faster than a paper filter and it pays for itself by not having to ever buy another oil filter! Add Amsoil and no more wording about hot oil, my fans have not come on yet! I do not know how hot it has to get outside before the cooling g fans come on but it must be real effing hot!