gt500 driveshaft

Ford Stock Drive Shaft - Ford Part number BR3Z-4R602-H but drive shaft shows 7R3Z-4K15-CA This was installed on my 2007 Shelby GT500 Supercharged 5.4 L V8 and is in great condition. This was installed for 12,882 miles. I don’t know why the drive shaft shows 7R3Z-4K15-CA but when I go to a...