@Anderson Design & Fab might know. I believe his SH and SJ strut top spacers are the same design.
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SJ on the left SH on the right
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I was able to get more information out of KYB this morning about the SJ vs SH strut, it would stand to seem that the SH and SJ share the same front housing with the same spring perch height, however the SJ does have a shorter stroke. The SJ front strut from kyb is cross listed for the 2013 crosstrek. Interestingly on kings website it lists the KSFS-55 front spring for the SH,SJ and crosstrek, so I would think it stands that one could use the KYB SJ front strut on the SH and it would be no different other than the spring being more “pre”loaded, as long as the sway bar is connected I doubt you would see any reduced droop. I looked at pics of the top assemblies on ebay and it looks like all the same upper spring perch and tophat. All that being said the front damping rate is almost double from the SH to SJ, and why people complain why their SJs are so stiff.
The rears seem a little different the SJ rear seems to have a ever so slightly higher spring seat but longer stroke, which would probably play nicely with the king or other lift spring especially considering the damping is so much higher.
At this point I am going to use the KYB SJ for my king spring install on my SH.
The rears seem a little different the SJ rear seems to have a ever so slightly higher spring seat but longer stroke, which would probably play nicely with the king or other lift spring especially considering the damping is so much higher.
At this point I am going to use the KYB SJ for my king spring install on my SH.
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Update:
I installed the SJ rears kyb PN3410015 with king spring KSRS-56 on my SH. Im am happy to report that it rides great in the rear and seems to be better damped than expected, it feels significantly firmer and more confident in the rear. I think I would have not liked the kings on the normal SH rears based on my calibrated compressed by hand shock dyno. I did reuse the longer Closed-Cell foam bump stop from the SH over the shorter hard Rubber ones the kybs came with, I felt like the foams would give a more linear approach to bottom out over the rubbers.
A Very interesting development on the front, I messed up and ordered the wrong shock, I ordered 993484(SH11-13) and a 993485 (SJ), and yes the hand shock dyno would suggest the SJ are firmer than the SH11-13. Sure enough, at rest you can see that one of the shocks has a shorter shaft by about an inch in the pic. I started to pull on the 993485 shaft because before I figured out I had the wrong shock I though I got a defective shock, to my surprise i was able to pull the shaft out to the same length as the 993484 and then it would return back on its own. I did it a few times before it dawned on me there must an internal top out bump stop that would not have any impact on regular driving but might aid in some situations where the wheel droops fast(pothole maybe). But, basically they are the same and there is no reason you could not use an SJ front on a SH. Only other things of note, the spring perch look different but the king rest the same on them and I will need to double check the ABS tone line bracket it looks a bit different(same spot, just the SH09-10 use a bolt and both of these don't have a capture nut)
I installed the SJ rears kyb PN3410015 with king spring KSRS-56 on my SH. Im am happy to report that it rides great in the rear and seems to be better damped than expected, it feels significantly firmer and more confident in the rear. I think I would have not liked the kings on the normal SH rears based on my calibrated compressed by hand shock dyno. I did reuse the longer Closed-Cell foam bump stop from the SH over the shorter hard Rubber ones the kybs came with, I felt like the foams would give a more linear approach to bottom out over the rubbers.
A Very interesting development on the front, I messed up and ordered the wrong shock, I ordered 993484(SH11-13) and a 993485 (SJ), and yes the hand shock dyno would suggest the SJ are firmer than the SH11-13. Sure enough, at rest you can see that one of the shocks has a shorter shaft by about an inch in the pic. I started to pull on the 993485 shaft because before I figured out I had the wrong shock I though I got a defective shock, to my surprise i was able to pull the shaft out to the same length as the 993484 and then it would return back on its own. I did it a few times before it dawned on me there must an internal top out bump stop that would not have any impact on regular driving but might aid in some situations where the wheel droops fast(pothole maybe). But, basically they are the same and there is no reason you could not use an SJ front on a SH. Only other things of note, the spring perch look different but the king rest the same on them and I will need to double check the ABS tone line bracket it looks a bit different(same spot, just the SH09-10 use a bolt and both of these don't have a capture nut)
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