CSX M808:
Leading: CSX 7573.
Trailing: CSX 840.
CSX X038:
Leading: CSX 5117.
Trailing: CSX 5.
This is CSX X038 (an extra CSX I038) clocked at 51 mph while doing a horn salute with a cool horn racing CSX M808 which also did a horn salute. We saw this with our cousin @jeffersoncitysubrailfan.