Degree shims are generally installed between rear leaf springs and the axle. Designed with a taper to rotated the rear axle to help eliminate vibrations that can sometimes occur in lifted vehicles.
4 degree axle shims 3" wide w/3/8" center pins (pair)
Ford F250 Pitman Arm 1980-1996 by Tuff Country #70200
3/8" Leaf Spring Center Pins (pair)
7/16" Leaf Spring Center Pins (pair)
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