many say that a aftermarket intake makes less than the stock airbox. im not sure i have seen dynos go both ways on this. if your gonna buy a intake get a short ram so there is no risk of your motor using it as a straw when it rains hard in the summer. i have a injen sri and i love it. cant say that it makes more power but it sounds insane and it makes workin under the hood alot easier. just my .02