I called BMW USA and asked them for basically the same information. They told me to call my local dealer. It just so happens that my dealership has the best BMW parts guys any where. He couldn't find it for me. He had the original sales material and all of the technical information that the dealership recieved. He said the only way to find out would be to track down the company that was making the OEM springs for BMW that year. He did not have that information at his disposal.
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