Interchangeable seats and belts

[17SIYoDood]

Excluding base model. Are all the seats and seatbelts all interchangeable through the trim levels? I don’t care about heated seats. Just will they bolt in and will the seat belts plug in to the harness with no modifications. Not sure where to post this. I used the search button. Couldn’t find my answer anywhere either.

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[ayospoonay]

I also would like to know this. Would like to add the R ones to my Si