Because i had to cut them into little tiny pieces to get them off the subframe.
When the bolts sieze up in the bushes you will eventually tear the bush away from the arm trying to undo the dam things, your then left with a bush attached to a bolt and no way of undoing the bolts the only solution was to cut them off piece by piece lol
So i bought new arms and pressed out the brand new bushes and replaced them with polybushes.
You have to be super careful with these bushes as you can easily deform the seat for the bush sleeve, if you deform the seat the new sleeve will literally drop right through the hole instead of being a friction fit. I did this and had to tack weld the outer sleeves for the bushes to the arm. You have to be very cleaver with what you use to press the bushes out to not deform the arms.