Actually, you would be better to use the Z6 headgasket as it is
a tad thicker tha the Y8. Why? Because detonation is a B*TCH!
Trust me, you'll make a nice chunk of power from the A6/Y8 combo!
Let me know if you need any more help.
http://members16.clubphoto.com/ken658816/guest-1.phtml