right one of these have gone on my car (bugeye wrx 2001) but can you change these on there own or do you have to change the whole arm?if so is it an easy job to do or do they have to be pressed out?
it the lower one in the pic that has rusted/the one that goes onto the hub



this is not the pic of my arm its just a pic i have found for you to use as a reference

 

sorry i think they are the lower ball jointsso they can be changed

 

lower ball joints??they simply bolt in dont they?i may be wrong!!

 

yes mate they do cheers