Edelbrock Adjustable Return-Style EFI Fuel Kit #3604 includes everything needed to upgrade a carbureted fuel system to a high pressure EFI system, excluding the fuel tank. This kit is a return-style and will complete the fuel system loop by returning unused fuel to the tank. Kit includes a 67 GPH (215 liter/hr) fuel pump, adjustable regulator (35-90 PSI), filter, Russell Twist-Lok hose, hose ends, mounting brackets and hardware. A baffled fuel tank is recommend to prevent fuel starvation. This system is rated for engines up to 600 HP, when used with an Edelbrock EFI system.