Yep, kday, you are correct. I think I was misreading the original thread about installing the 044. The issue was raised that if you don't use a "high pressure" hose (i.e., one rated for fuel injection) it may burst. I wasn't thinking at all and that what's there already is fuel injector hose rated at 180 PSI plus.
I found the top flow number in the manual too. It is 600 cm3/15s at 13V (ramping up from the minimum of ~320 cm3/15s at 9V). So the flow range between 9V and 13V (which is controlled by the fuel control module J538) goes from 78 liters/hour (20.6 gal/hr) to 144 liters/hour (38 gal/hr) for the stock set up.
Since 044 Bosch pump requires reflashing the ECU with the 5 bar regulator, I need to first call APR because I have their ECU.
So, I will spend the weekend trying to figure out if I can find a pump that matches the flow of the stock set up to avoid dealing with a reflash.