Regular production option...... hmmmm, interesting. Thanks! That's neat to know.
So in this case, does the "RPO" refer to the rocker panel / sill plate molding? In other words, was there an option that deleted that aluminum molding and when that was the case they installed this additional door seal? I don't understand why the lack of the molding would require an additional door seal. Perhaps I'm running down the wrong rabbit hole....