Best filter AC Delco has. I've ran them on the Z06.
How was your oil pressure compared to other filters?
Exactly the same from idle to redline. The Z06 has a digital oil pressure and oil temperature readout, and I've compared oil pressure at the same oil temperature (200 deg F) with 4 different filter brands. Never saw any difference because of the positive displacement oil pump, and the oil pump never hit pressure relief with fully hot oil.
Run those AC Delco UPF filters, you won't have any issues.