Did see anything in the FAQ thread, is there a difference in the tune of a G35 coupe and G35 sedan (same year revup)??

 

I believe the engine changes were staggered between the years, sedans got the hr before coupes (37) but other than big things like that, my understanding is that they are pretty much the same on like for like motors...

 

ECU's are directly swappable for the same trans and same years.