So, after all of my cooling issues were solved, I blew a damn bypass hose. But the one they have listed (18010 GAT) is not the one I needed, apparently. I'm not entirely sure even where on the B6T is any kind of 1/4 inch hose for coolant. All the small connections are 5/16, apparently. The hose in question that rotted apart and became un-cunted plugs in underneath the intake manifold, and goes to the low side of the IAC. You can jimmy a 1/4" line onto it, but I don't recommend it.
Tl,dr: Incorrect hose in O'Reilly catalog.