Delphi MF0158 Mechanical Fuel Pump

Delphi MF0158 Mechanical Fuel Pump Overview

The Delphi MF0158 is a standard replacement mechanical fuel pump for gasoline applications that require threaded inlet and outlet connections. Built from Delphi’s OE-focused engineering background, it is specified for consistent fuel delivery and direct-fit service on select classic Chevrolet Corvette models.

Compatible with 1968-1972 Chevrolet Corvette, this mechanical fuel pump is a practical choice for restoring proper fuel supply on Holley carburetor setups with a 2 line pump configuration. The Delphi MF0158 combines OE heritage with application-specific fitment for service work on vintage Corvette fuel systems.

Key Features

• Mechanical fuel pump for gasoline applications
• Threaded inlet and threaded outlet connections
• 5/8-18 UNF outlet fitting thread size
• Average flow rating of 40
• System pressure rated at 7.5 psi
• Standard replacement grade for service use
• Package includes the mechanical fuel pump and instruction sheet

Detailed Product Description

Delphi MF0158 is engineered as a mechanical fuel pump replacement for select Chevrolet Corvette applications from 1968 through 1972. It features a 0.375-inch inlet outside diameter, one threaded outlet, and a 5/8-18 UNF outlet fitting thread size for a direct service replacement on the specified fuel system layout. The pump is designed for gas fuel type use and is listed with a 7.5 psi system pressure and 40 average flow rating. Delphi draws on more than a century of OE experience and supplier knowledge to support aftermarket parts built around original-equipment service expectations.

This part cross-references Airtex Fuel Pumps 40709 for the same application.

Common Problems This Part Can Address

• Low fuel delivery to the carburetor
• Hard starting caused by insufficient mechanical pump output
• Fuel starvation during normal engine operation
• Pressure loss in a worn or failing original pump
• Service replacement needs on a classic Corvette fuel system

Installation Notes and Tips

Verify the vehicle is a 1968-1972 Chevrolet Corvette with a Holley carburetor and 2 line pump configuration before installation. Confirm threaded inlet and outlet sizing, fuel line routing, and mounting alignment against the original pump before removal. The gasket or seal is not included, so inspect the sealing surfaces and use the correct service parts required for your application. Follow the instruction sheet included in the package and prime the fuel system after installation.

Quality Assurance

Delphi builds aftermarket fuel system components using OE heritage and application knowledge developed through long-term supplier experience with major automakers. The MF0158 is a standard replacement mechanical fuel pump intended to meet the service requirements of the listed Corvette applications.