255/35/18 Pirelli Box S (Yes or No?)

[Dlirium]

Looks like you have plenty of info in the posts below, but I will also chime in - I wouldn't even consider the Pzeros at any price, especially if you are planning on tracking. Had them on my Pantera, and couldn't wait to get them off.

[BYprodriver]

No, I think OP is inquiring about the size which is to small for a Box rear.
Reduces load carrying capacity while increasing tendancy for sudden oversteer.
Puts more miles than actual on odometer.
Shorter tires on rear than front upsets handling balance.
Pirelli have been highest maintenance brand name tire during my experience with them.(1985-2002)