do you know if the em1 si interior will fit into my eg hatch? Both front and rear seats
or search here. Stuff like this can be answered if you search a bit.
But here ya go...
Swap seat rails, use your stock seat rails on the EM1 front seats, they'll line right up then.
Coupe rears will not fit the hatch, coupe/sedan seats mount, secure and fold differently than those from a hatch. Hatch seats fold 50/50, coupe/sedan is more like 60/40.