I know this has been discussed before but not in awhile and the top RX-7s seem to be going faster and faster.

Am I correct that there are 3 choices: stock iron, carbon (Racing Beat), and ceramic?

The first 2 are priced about the same and I am not seeing why the carbons would be any better than the stock - no?

The ceramics are close to $2000 at the current sale price from Mazda. Is anyone here using them? A guy at Mazda yesterday told me that "they are good for 17 hp." That is mind-boggling to me because that would mean north of 190 rwhp. Any truth to that?