I ended up taking off the rears, as there is no way for them to be vertical or even close to vertical in combination with the perrin bar. I inspected the links and the brackets for them.. One of which was slightly bent, and the stud on one of the links was stripped where it went through the sway bar. Not very happy with these: was originally going to get kartboy ones, however I was duped into buying these. Bad call, dont buy them if you plan to pair with perrin sways.