Just replaced my pads and rotors at 48k miles, the rotors hardly look worn even after two track days.

 

Do yourself a favor and get the Akebonos. If you don't, you'll probably wish you did. Then, you can move on to the next mod, and then the next, etc.... It's why you joined this site right? Lol.. I know it's why I did.

 

Is the OEM material for the Akebono sport setup semi-metallic or ceramic? What about the NISMO R-spec?

 

Google is your friend.
NISMO PARTS CATALOGUE 2017