What is the box thats behind the filter. If you follow the opening from the filter bos through the fender and down it leads to a big box. What is it? Im gonna remove it unless someone tells me otherwise.

thats a resonator box, it's like a muffler for your intake. Taking it out will only make your car sound like if you have an aftermarket intake. I took both of them out (there's also a tiny one on the pipe going from your throttle body to the filter box, if you take that one out you NEED to plug the hole)

All of those are removed, i installed an Injen Intake.

thankx