You could have a left and right STRUT (where the sway bar mounts) and two left or two right HATS (part number 1 on the diagram).
If both hats have the same part number, you have two of the same part. On 93 and later M3s, the left and right hats are different.
'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)