I personally think that all CAI will give you the same sound for the most air. It'll be that nice lil ' psssss sound along with a deeper throaty sound from the motor as you increase in RPM. I have the Injen intake and I like it a lot. One reason would be that it's a two piece kit so you can change it from cold air to short ram. I currently live in SC where it rains a lot so for the mean time I'm keeping it a short ram until I move to a dryer Cali where I can then attach the cold air piece. The last thing you want to do is have your motor suck in water.