This Ball Housing is appropriate for all SY Accumulator control valves.  Earlier cars have housings that look a little different but this supersedes those as well.

The ball in the original ball housings get a flat spot on them from years of being pounded on by the bobbin piston but this these housings have a ball made from Silicon-Nitride Ceramic.  They are orders of magnitude stronger than the original steel ball and are guaranted to never get a flat spot.

The housing is made from heat treated 4140 Chromoly.

These housings are included in every compete rebuild kit but are available separately here.

SY Accumulator Control Valve Ball Housing UE35227