I have a pretty sweet 86 4000 CS Q that I am slowly tricking out. I will post some pix soon.
I just installed the short shift kit from Blaufergnugen. IT ROCKS! It is a MUST DO! The shifts are short and sweet. Very solid feeling. Feels alot like the 6 speed Miata I blasted around the island of Maui in recently. Here is a link to the part on Blau's site.
http://www.audiquattroparts.com/product%20showcase/short_shift_kit.htm
Labor cost me about $80. Long live the 4KQ!

I thought that would be the same shifter/linkage??
Are you sure it isn't? Call Blau.

No. It isn't. The Coupe GT uses a different linkage setup to the 4kq. The 4kq is closer to the 5kq setup, due to the transmission.

Cello
'85 Coupe GT
'90 Coupe Quattro
'99 A6 Avant

I agree. My Short-Shift kit from Blau is fantastic.