New struts/springs for '91 HB W/HICAS

[P.W.Royce]

I was thinking of replacing some suspension parts but I know mine are a little diferent. Are there aftermarket struts and prings that are designed to work with the HICAS system? The HICAS cars ride a bit lower than the rest, but I can't see what the diference is with regards to the struts. My factory manuel dosen't list a difference in the struts although there must be some (valving maybe?). Any help unraveling the intricacies of this model would be apreciated.