ok, so they are the same subframe....ALMOST.
S14 NA and Turbo, are both different in one aspect. The differential rear plate mounting. THe NA silvia s14 has them super close together, where the turbo version has them spaced the same as the WGNC34 diff cover.
ALSO, it is liek 40mm more narrow.....
I mean, everything fits. the axles are a tight fit, but they pop into their carriers, and nothing binds, hits anything, etc etc
SO, what does this mean?
IF you have a problem with your subframe, bent, broken, cracked, etc etc you can replace it with an S14 TURBO directly. no modification. your ebrake lines FEEL too tight, but they arent. pull on the handle a few times, and everythign settles nicely.
You are able to run 20mm less offset on each side, (IE if you were runnign a 9 inch +20offset you can now run a 9 inch +0 offset) with less work, OR even wider wheels if you wanted to with less work.
the entire swap takes about an hour and a half to 2 hours if you know what you are doing, and isnt super duper complicated.
just rememebr those brake lines and ebrake lines.
if this belongs somewhere else, please move!