Each SVT product has been assigned a unique SVT build # that is mailed automatically to each buyer of the new product. If you have purchased a pre-owned SVT vehicle you may obtain your build # from ford by calling 800.FORD.SVT. Just have your VIN# and registration handy and they will mail you your certificate by mail. You will need to fax your current registration as proof to Ford at 313.621.2500. Special Edition SVT owners also receive a letter of authentication stating another build # for their special edition vehicle. Special edition vehicles include the Removable Hardtop 1995 Cobra Convertible, 1996 Mystic and 2004 Mystichrome Cobras and of course the 10th Anniversary 2003 Cobras.