Fuel Pump - Mechanical - 40 gph - 7.5-9 psi - 3/8 in Hose Barb Inlet - 5/8 in Inverted Flare Female Outlet - Aluminum - Natural - Gas - Small Block Chevy - Each . **NOTE: 3/8 INVERTED FLAIR OUT 3/8 BARB IN rated from 7 to 9 psi. use #M4513 for the same pump rated at 5.5 to 7psi Other pumps rated under 7psi is M6900,M5900P, EDE1721