New Springs

Has anybody heard of, or tried these OTTO Racing Springs (Tuned by Gold line)?

http://shop.store.yahoo.com/procarparts/chca93upotra.html

or theres this site....

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7941764499

If anybody can get more info on this, that would be great

nobody at all has heard of these....

One would think that if these are "racing" springs, the spring rates would be listed...

Dave