OEM stands for Original Equipment Manufacturer, which means the parts are made by the same company that makes the vehicle. Meanwhile, aftermarket parts are produced by a different parts company and are often designed to be compatible with as many makes and/or models as possible.
Part #'s
03F-907-660-E / 03F907660 E / 03F 907 660 E / 03F907660E
03F-907-660-D / 03F907660 D / 03F 907 660 D / 03F907660D
3F9-076-60E / 3F9 076 60E / 3F907660E