its a good idea to have one, but everytime u adjust ur coilovers your gunna have to go get an alignment print out to see how much the camber has moved, then adjust the camber setting accordingly w/ the print out, and then get another alignment to have the toe and caster settings adjusted. so once u drop it and have the camber kit all set, its good to just leave it. im dropped 1.75 up front and 1.5 on the rear and i dont got a camber kit because of clearance issues. the camber kit was banging on my inner fender wall everytime drove over a bump. i didnt want to bother with bending my control arm or shaving/banging in my inner fender. i just have my tires rotated every oil change. if i get some better wheels w/ expensive rubber then ill probably put the camber kit back. inner tire ware sucks espeically on expensive rubbers.