Ah.. ok.. I understand the question.
The 005 preface indicates that the part is an assembly.
When a customer orders a 2gb machine, the boys in the assembly area know that they need a 005348430 to configure it. That part would include the 2gb hba, memory, software, and code needed for that particular box. Ordering a 1gb would get likely be an identical board except for the 1gb hba. If you look on the SP itself, you're likely to find a different part number that just applies to that subassy. In the old days, that number started with 118.. EMC may be using their numbering scheme now. I suspect that the subassy part numbers on the sp's will be the same.