Rear strut
There's a lot of new vs old style 964 rear strut confusion. My car is 90 - old style.
New style 964 struts or 993 struts will fit "older" body with proper adapters, I bought mine from Jeff @ Rothsport
Here are some details:
Newer 964 struts are similar to 993 with exception of upper mount. 993 uses 4 studs 964 uses 3 (which are different from older 3 pattern
). So for older 964 easiest and no brainer way - go for 993 rear struts + adapters.
Here are spacer measurements for reference:
Side view of 993 top:
Order - what parts go on the strut (also see Bilstein documents below):
Here's mounted spacer with 993 top mounts:
and comparison to stock rear strut assembly (with Eibach spring):
Oleg.