wax, that's why I don't own that car anymore. It scared the living hell out of me...
This is probably a better video, it doesnt have the C6. Just the 350 and the 370
VIR 350Z 370Z Hot Lap Side by Side - YouTube
The 350 did have semi-race rubber vs the street tire on the 370. You can see the grip advantage at the start vs. where the 370 walked away at the faster section and straights. Is it worth the extra $15K to upgrade into one?