This page details some of the examples on NOS genuine Ford intake and exhaust valves, as well as similar era replacements.
Model A and B valves are interchangeable, and the original A-6505-A part number was changed to B-6505 with the introduction of the Model B Ford in 1932. There was no distinction between intake or exhaust valves.
The pics above and below shows a comparison of two styles of NOS Model A valves on the left, and the comparable unmarked era replacements made by Rich on the right.
The table below details the magnetic properties of various valves and their components.
Part Number | Style Description | Head | Stem |
---|---|---|---|
Ford A-6505-A B-6505 |
Smooth stainless head Stamped Ford script marked "R" |
Slightly magnetic | Some magnetic Some non-magnetic |
Rich V600L |
Smooth stainless head Unmarked head, number on stem |
Slightly magnetic | Magnetic |
Ford A-6505-A B-6505 |
Indented dish head Forged Ford script marked "R" |
Magnetic | Slightly magnetic |
Rich 600 |
Indented dish head Unmarked head, number on stem |
Magnetic | Slightly magnetic |