UrlScan can do this by setting RemoveServerHeader=1.
If I understand correctly how you are trying to test this, I believe that your test is not valid. The SOFTWARE_VERSION, REMOTE_PORT, etc. server variables visible in ASP are not response headers.
The proper way to test this is to use a sniffer tool to look at bits on the wire or a test client like wfetch that can show you the raw headers that the server returned.
Thanks,
-Wade