Just a little story about why I changed to the SE HB AC, and different filter to keep lowers.
The one thing I would say is that I had the SE Ventilator AC when I went from 255's to a full SE Stage IV Race Kit, they were having a hard time getting enough air through it to break much past 100HP. I had the K&N filter in it and was cleaned even. I went strait to parts and found a 58mm TB ready Heavy Breather and then Ryan, my dyno tuning guy, installed it and then he tuned it fairly conservatively for no pinging and ok milage like all of the tunes I have had done in the last few years. (Gas got too high to ignore anymore.) Currently running 117hp/110tq with my 103