There are several ways to do this but unfortunately there is not a simple "bolt on" like with the 83-85 944NA. The best year to use is the 86 because it has the hubs designed like the 83-85 and the 87-91 have wider hubs and some have ABS also. In simple terms the 83-85 spindle to strut mount is short and fat and the 86-91 mount is tall and skinny. The below methods, with the exception of the MBT kit, also require the use of a 'bump steer' kit from Topline Parts to mount the tie rods and the use of a 17mm ball joint from Kerscher in Germany. Take note that the Turbo spindle does not have the hole for the speedo cable.

The best way (and safest) is with a kit from MBT that has hubs and caliper mounts that bolt to the Super's spindle and keeps the original steering geometry. Nothing is welded or altered and this is an actual bolt on kit; however, it costs US$3,000.

Another way is to weld the holes on the Turbo spindle and redrill them in the 83-85 pattern. The Turbo spindle is thinner than the NA by 2mm so this will have to be accounted for also.

Lastly, what I did, is to take some 951 (944 Turbo) struts and build a coil-over kit to fit the Super, like I did with these. This way the spindle to strut mount is factory and not altered in any way with welding or shims.

NOTE: Keep in mind when doing suspension modifications/alterations that if these components fail it may result in loss of car or life.