Im looking for an intake to add some throttle response. Im not looking for power, MPG's, etc because i know thats ridiculous to ask for out of a CAI. I just want the sound and throttle response. what are the best intakes or drop in filters. I know the stock one on my 09 v6 4x4 is a Cold Air Intake but what are my options for either replacing the stock intake or using a different drop in filter? Also, did any of you take out the secondary filter or leave it in?