Cummins ISM, Fan Clutch/Hubs, (GOOD USED) Horton Peterbilt 320 Fan Clutch For Sale, Part # 79A9415-2 For Sale, Part # 79A9415 2, 79A94152, Viscous, OEM Horton Part # 989415, Horton Service # 79A9415-2, New Horton Service # 79A9415-2, Horton Old Service # 999415, Manufacturer # 99415, Fits Cummins ISM, Fits 2004-2010, Serial # 7724312, Stock # 6044 | Tested & Inspected!