Holley Bypass Fuel Pressure Regulator Kit # HO12-882KITHolley Bypass Fuel Pressure Regulator Kit # HO12 882KIT Fuel Pressure Regulators, Die Cast EFI By Pass, Adjustable, 15 60 psi, Return, Inline, 3 8 in. NPT, 1 8 in. NPT, Ports, Fittings, Gauge, Bracket, Kit Regulator Pressure (psi): 15 60 Regulator Style: Return Regulator Location: Inline Boost Vacuum Reference Port: Yes Boost Vacuum Rise Ratio: 1: 1 Gauge Port: Yes Inlet Quantity: 1 Regulator Inlet Size: 3 8 in. NPT Inlet Attachment: Female threads