Here's a pic of S14 seats in my S13. Requires L-shaped brackets and there will be a small space between the seat and the trim. Someone buy these seats from me plz!



For reference:
S13, S14, S15 front seats are all interchangeable with each other
Skyline front seats will go in S13, S14. But I believe there was a minor modification needed, one of the bolts doesn't line up.
S15 rear seats will go in S14, can't remember if it requires modification, I think they are the same as S14 seats tho. So should be able to fit S13 too with mods.