Fram
These filters are manufactured by Allied Signal, Inc. See this email from an Allied Signal production engineer.
Fram Extra Guard PH8A
This filter cartridge has a small outside diameter with a rather low filter element surface area (193 sqin), and features cardboard end caps that are glued in place. The rubber anti-drainback valve seals the rough metal backplate to the cardboard end cap and easily leaks, causing dirty oil to drain back into the pan. If you have a noisy valve train at startup, this filter is likely the cause. The bypass valves are plastic and are sometimes not molded correctly, which allows them to leak. The backplate has smaller and fewer oil inlet holes, which may restrict flow.
The telltale signs for a Fram Extra Guard are: It has 8 small holes for the oil inlet and a thin, cheap looking backplate, and is currently stamped with a "2Y". There are 5 very small crimps holding the gasket in place. If you look into the center hole all the way to the top of the filter, you will see a kind of "button" in the end cap of the cartridge (which looks like it's made of metal from there). This is the plastic bypass valve.
Exploded view:
Average Retail Price $3
Cartridge Length 4.125 inches
Cartridge Outside Diameter 3.000 inches
Cartridge Inside Diameter 1.375 inches
Cartridge Pleats 34
Cartridge End Cap Type Cardboard
Anti-Drainback Valve Type Nitrile rubber diaphragm
Bypass Valve Type Spring-loaded plastic
Element Type Paper media, stamped metal seam
Element Length 47.5 inches
Element Width 4.063 inches
Element Surface Area 193 square inches
Shell Thickness 0.015 inches
Backplate Thickness 0.089 inches
Gasket Type Nitrile rubber