you know thats funny b/c i was just wondering that same thing the other day. i thought that they may have sent me the wrong pump. i mean he sent me the wrong tie rod end after i told him repeatedly it was for the driver side and he still sent me the passenger. f*&^ing idiots. i need to find a way to check which pump i have. it looked just like the stock one i pulled out. any clues there? i may just call them and see if they have record of what they sent me.