I might have read that most fans have trouble staying quiet when horizontal. Is this true? Or are there any good SP/radiator fans out there that are quiet when mounted horizontally?

One (1) Trailer Mounted Horizontal Radiator Assembly MTU 12V4000 - Rebuilt Allison 9823 - Rebuilt Power End Assembly - Rebuilt Fluid End Assembly – New 4.5” 8671, 8749, 8826 ...