My GT came with a HUD... its a option.

And it WILL be clearer with the proper windshield.

http://www.grandprixforums.net/glass_part_numbers.php

According to this: Ontario Quebec Club Grand Prix • View topic - changed windsheild and HUD looks different now

The difference in cost is $200 or to $800 or whatever for the HUD.

Ian (ENT) posted the procedure...

they basically do tests on each window produced and those that are crisp clear and smooth (microscopically...or something genreally alone those lines). are passed for HUD use, whileothers aren't.