Anyone remember the Lexus LFA Nurburgring Edition? Yeah, me neither. But at least you could've actually bought that one(assuming you had $450k to blow).
This is just like what Pagani tried to pull at the Top Gear track. They used non-stock tires to set a record lap(which were later proven to be racing slicks with hand-cut treads), then tried to hide it by saying they were some kind of super secret new Super Tire developed by Pirelli, which would "eventually" be available as an option on the Huayra. That tire turned out to be the Trofeo R, which look and function nothing like those slicks.