Greg, I havent done my brake ducts yet either and have put a little bit of thought into it tho. Racer wholesale sells naca ducts for a reasonable price. finding ducting is cheap at a hardware store i believe. but, i think im gonna cap the end with a 3"-2" reducer to increase the exiting velocity, higher velocity would be better than more volume of air in my theory. Also BMWworld has a brief theory page of brake ducting.
http://www.bimmerworld.com/catalog/brake/c...ling_theory.htm

http://www.racerpartswholesale.com/naca.htm

Btw, let me know if you think you could use my help next weekend at Laguna. Thinking of dropping by. email me offline.

[This message has been edited by Tyson (edited April 22, 2002).]