Originally Posted by cossie1600

nada. unlike most people here, brake cooling is the least of my concern as i have tracked cars that are faster with smaller brakes. they all seem to stop fine with the one exception to the 350. for a 20 minute hpde session, i am not sure how much the ducts help. i look at it as one of those things that help, but not really big enough for me to worry about. you are better off spending money on better pads, better brake fluid and cryo treat your rotors. this is a bigger problem for guys who race their cars side by side.......