Not a stupid question cause I paid no attention to that nor did I know there was a difference.

If you look closely you,ll see 2 are a tad longer.Just put mine together and I think the shorter 2 go on the clutch side...You,d think I,d remember but it was on a long weekend.If you mix them up I think it could cause your mounts to break due to the twist.Aluminum doesn,t like to bend like steel,it breaks.