BLEEDING BRAKES with a PROPORTIONING VALVE

No, you do not have to mess with the prop valve to bleed the brakes. Most OEM prop valves are not even adjustable. How would you bleed the brakes if it were all OEM? Think about it.

My guess is the factory setup is a given, as all would be the same. The after market discs are installed in most cars that had drums up front. That is why the adjustable prop valve, does that make sense??? Thanks