Hey now I like my window guard things. I think they look good and it's nice to be able to roll my window down slightly in the rain without water coming in. However I do agree on the big bed cap thing on the back. I also am not too crazy about the bug guards on the front but other than those too things it's a sweet truck. Actually even with those two things it's a sweet truck.

 

A hiss with those open element filters is normal. Its the sound of the air being sucked in.

Double check the "seal" where it meets the TB, but I am willing to bet that its just the new air cleaner doing its thing.