I recently purchased an UltraCool model RF-1 Oil Cooler for my 2002 FLHTC Harley Davidson. The installation is relatively simple for someone with a little mechanical knowledge, BUT you need to follow the instructions step by step. I very much like the fans to keep the oil cooler in traffic this is especially important for me with a 103ci. When I install an oil temp gauge I will let you know what the temperature difference is.