i would raise the car, loosen the lugs and re-tighten evenly using the 5 star pattern to see if it helps. use 80-85ft/lbs. use a torque wrench.
if you still have vibration, remove the spacers, clean the rotor and hub, try swapping the wheels left/right and see if that helps.
if you still have vibration try swapping just the spacers left/right.
if you still have vibration get some H&R's or Eibachs.
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