Airtex E8251 Fuel Pump 100 percent tested throughout the entire manufacturing process for worry free, out-of-the-box performance Advanced polymers, brushes, and commutators to ensure long life and durability in multiple fuel blends Comes complete with special in-line installation kit. E8251 may be used as a booster or standby unit or as a completely independent fuel pump installation Operates at 2.5 to 4.5 P.S.I., delivers 30 G.P.H. at free flow, 1/8" N.P.T., 5/16" hose Lifetime Limited Warranty