No secondary regulator, from what I read about the stock fuel rails, they've got a diaphragm regulator built in. So my regulator is bringing the pressure down to ~60 right where the fuel line connects to the rails. Then if i'm not mistaken, the rails themselves drop it to 58.5 internally. If this is wrong, I do have a set of Holley fuel rails I can swap in and then have more ability to control the flow and pressure and even do a true return style fuel line.