thanks, but i think i got some good info myself in the end more or less. in 2003 they built 583 street gt3s, in 04 1544 plus 142 gt3 cup (this might refer to fiscal years though which end in july, so the cars sold after juli 04 would not be in here) The prod. numbers for gt3 rs are 654 and only 22 for gt3 rsr.
anymore thought to the change from tt to gt3 from you guys?

cheers