Currie
offers a selection of over 30,000 combinations of assemblies,
options, and configurations. It would be impossible to
assign everyone a simple part number. Therefore, Currie
has implemented a part numbering system that enables us
to provide for an infinite number of part numbers by identifying
the components for each custom assembly.
The Currie Custom Third Member Assembly Calculator (link
above) will help you identify your custom part number.
Check it out.