And for anybody else asking about the brake ducts.
I got the brake ducts from Nissan MotorSports. Phone 888-833-3225. They list for $612.00 each. So you need 2. A left and a right. Part numbers 41152-RTZ40 for the right. 41153-RTZ40 for the left. I used the Stillen brake duct kit too. That's an extra $200+. As you see. This is not cheap by any means. If you have more questions. Feel free to ask.
Rusty