Performance Suby: Thanks for the information - very helpful.
Boxterfan67: Yes, I realize that this is a purely cosmetic "upgrade". Of all of the mods I have ever made to any of my cars, I can't think of a single one that made the car faster, last longer, or ride better!
Performance Suby - thanks again for your help in figuring out the correct part numbers to order. The Gen4 Outbacks use the same brake pedal as Gen2/3, but use a different accelerator pedal. The correct part number for the WRX style accelerator pedal for Gen4's is 36010AG150.
Here is a picture of the WRX pedals installed on a 2013.