I'm about to install the FP Track Handling Pack and the only issue I'm having is the bearing / bushing removal. Do I have to swap out the old one or can I just use the one's in the car with this package? Has anyone not replaced it? Can someone shed some light or insight as to the benefits of doing so or if I'm "OK" just going with the performance Toe Links (M-5972-M), and not changing the bearings (M-5A460-M). See below. Thanks in advance.