Oil pressure Question: What causes this?

Well, here is my setup. It's an Amsoil BMK-13 dual filter, ultra low micron filtration system. The oil passes from the engine, to the filter base, then to the B&M oil cooler that you can see at the bottom of the core support, then back the engine. Overkill? Yes...but that's the way I roll...unless of course it is going to cause problems.