Thinking about getting a cold air intake (I know that you don't see much hp gaines from them). I just want a little more aggressive sound. What is the cheapest cold air intake for a 2008 Silverado? I'm not interested in building the home depot one either, just a new one. Everyone says that they do the same thing no matter which one you go with, so I'm looking for the cheapest one. Also, should I go with the full intake or something like the airaid jr. kit with just the tube and filter. Once again, I know I will not see hardly any power gaines, I'm just looking for more aggressive sound. Thanks.