High Volume vs Standard Volume Oil Pump

afaik some aftermarket pickups are thin wall compared to the stock one...so the area inside is bigger = more oil flow possible. The moroso pickup for the 8 quart pan should be thinwall for example, i use these parts.

I´m not a friend of the hv pump, if the engine is built to high performance specs there´s not that much internal leakage, a hv pump will create only heat and relieve the pressurized oil into the pan via the pressure relief valve. Most engines make good oil pressure with the stock pump - at least mine does.

Michael