Factory hollow rear sway bars that fit on S chassis

[Def]

I'm trying to get some information out there about what factory Nissan rear sway bars are hollow and still fit on an S13/S14.

So far it seems like ALL S13 sway bars are solid = heavy.
The S14 has a 27.2 mm hollow front, and I've heard a hollow rear(15.5-16 mm). The front fits on the S13(original endlink holes a bit past the LCA, but it works). Does the S14 rear sway work on an S13?

I've heard J30 rear sways are hollow, and they are either 20.3 or 18.8 mm(HICAS model). gsracer swapped one on his S14 a while ago, which I'm guessing means it'll work on an S13 since the track width is only 10 mm off in the rear. Are both J30 bars hollow?


Any other factory rear sways that are hollow and work on these cars? Trying to avoid a super heavy solid aftermarket bar and not spend $200 on just a non-adjustable bar as most the hollow ones seem.