4 Speed Conversions provides pictures, descriptions and applications for OEM General Motors Vehicles. Whenever possible I use new old stock parts with part numbers on them or their packaging. I may also use good used and then reproductions to describe parts.

The applications for the various parts come form GM parts books, and assembly manuals (when possible) that I have acquired. Beware there could be typos as this is rather tedious. I will try to identify the sources of the applications to allow the reader to decide if a part is OEM or OEM replacement.

We stock the best in reproduction parts available. I do not, and will not sell inferior parts just to compete with pricing on other sites. Reproduction Parts are identified with (R)

Used and New Old Stock parts are available in limited quantities and priced based on condition and availability. These parts are identified with (NOS), (New OEM) or (OEM)