Use a search engine to find some of the "ford part decoders" and you can essentially figure most out by yourself just to start. As an example, a Ford part number might look like this:
The F4ZZ signifies the 90's, 1994 specifically, Mustang, and service replacement...
F=1990's (E=1980's, D=1970's, etc.)
4= year in decade, i.e., 1994
Z= Service replacement
The "5500" is the base number, in this case it is for rear suspension, specifically control arms. The last part just signifies the engineering changes. It's actually pretty simple once you get in to it!
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