90q brake upgrade woes :(

[Richard J. Andrews]

Hi all,

I was researching how to upgrade the '88 90q's brake system
 From what I've found it seems that all i need is the g60 calipers and 
carriers, some new pads
and some brake rotors, and a good flush.

I obtained the parts listed above and went on to remove the old caliper and 
rotor.
test fitted a new rotor it wouldn't fit (it was for a 90q20v 276x25mm  audi 
p/n 893 615 301)
i checked a coupe quattro and that one looked like the hat was even taller 
yet!

what gives? the pads look fine and the calipers fit on the rotors, which 
meant the rotors were correct in
thickness and overall diameter but the hat is too tall.

does anyone have the p/n for the correct rotors? do i need to redrill some 
5ktq rotors?

Thanks!

-richard