Its for the rear
Is it the rear where the problem exixts or the front?
One way to check, jack the car up by the towball 'till the rear tytres are clear of the floor (if one tyre comes off first that's a clue)
Stand on the centre-line of the car, about 1 1/2 length in front and look at the axle and bumper together, are they parallel or is the car leaning? If it's leaning then the front end needs spacing rather than the back.