Adjustable Lowered Rear Spring Plates for the Beetle All Years. These make spring plate adjustment a breeze so it is much easier to lower and raise the rear of your Beetle. These must be used with 21 3/4" torsion bars as fitted to most late swing axle beetles. They also use a 2" inner grommet and a 1 7/8" outer grommets. Please choose from IRS or Swing Axle Fitment Below.