Holley 255 LPH OE Style EFI Fuel Tank Modules 12 301 flowmaster 5 Series California Substrate Material 93356 FBHB 5 Series California Substrate Material Ceramic Air Tube Adaptable No Subtitle California CARB Compliant Converter Quantity 1 Title California Direct Fit Inlet Attachment Bolt On Type Direct Fit Main Piping Diameter 2 Outlet Attachment Bolt On Finish Stainless Steel Oxygen Sensor Location Pre Converter Mounting Hardware Included Yes Ideal for Use w Most Electric Water Pumps – for Big Block Chevy This in tank fuel pump module is a high pressure unit that flows 255 liters per hour (LPH) and is capable of supporting electronic fuel injection (EFI) engines producing up to 550 horsepower A pre calibrated fuel level sending unit designed to work with the factory fuel gauge for this application is included This module also features a HydraMat filter which has a unique internal reservoir that keeps fuel available at the pick up and also provides protection from contaminates Fuel pressure is internally regulated to 58 psi eliminating the added expense and effort of purchasing and installing an external fuel pressure regulator no separate return line is required because this module returns excess fuel right inside the tank traversing inclines