whats the US model?

I need some OEM S13 Redtop SR20DET parts and don’t want to order from the US or anything, so if I go to a dealership locally here, what car/engine has all compatible parts that will work on my motor? Thanks.

Japanese PS13. Some B13 parts will work on the engine. Most has been discussed on freshalloy.

Theres a whole compatability chart on Nico in the SR forum.