For early design Pro small body smooth aluminum shocks that have retaining clip groove, for 1-7/8" I.D. springs. 4" in length. SBA shocks are 1.63" O.D.
Note: Current Pro small body smooth aluminum shocks do not have the retaining clip groove and therefore are a non-coilover design shock. If a coil-over shock is required, a threaded body shock must be used in conjunction with coil-over kit 582-C330 for 1-7/8" springs or 582-C335 for 2-1/2" springs.
Coil-Over Mounting Guide (GIF)