Just installed the ECIS CAI on my ride...
boy you guys weren't joking....this thing is the biggest bang for the buck! It only took me about 20 minutes to put in, jumped in and away we went. You can hear the SNARL better over 3K RPM... and on the highway (MAN..let me not even begin to tell you how many people I had looking at my car wondering what the hell that sound was!!)
It's true though about the hissing sound. It's really faint when your going 10-30MPH. I just ignore it..have the radio on. Well thanks a lot guys for recommending the product!