Mechanical Fuel Pumps Free Flow Rate: 80 gph Maximum Pressure (psi): 8 psi Inlet Attachment: Female threads Inlet Size: 1/4 in. NPT Inlet Quantity: Single Outlet Attachment: Female threads Outlet Size: 1/4 in. NPT Outlet Quantity: Single Quantity: Sold individually. Fuel Pump, Mechanical, Ford, Cleveland/Modified, Each * Check to make sure this part fits your application An affordable pump that delivers. The mechanical fuel pumps are available in two versions; one has ¼ in. NPT inlets and outlets, provides 5.7 to 8 psi, and can free-flow 80 gph. That's twice what a normal pump delivers. T These pumps are triple chrome plated for good looks and corrosion resistance, and the lower housings of both can be rotated through 360 degrees, to make fitting into tight places a snap.