That's a good point, thank you. Holley makes a bypass style regulator, the model # is 12-803BP, but that is a higher pressure regulator, 4 - 7 psi. The 12-804 that I used has pressure settings of 1 - 4 psi. I suppose it would work just fine at the lower setting. For someone with a return line already plumbed, or who wants to add a return line that is a good option, there are benefits to that. It helps purge air from the line, it helps keep the fuel supply cooler, and it relieves pressure and eases the load on the pump. For positive displacement pumps I think it is a requirement.