This is exactly why I left the exhaust at just a muffler. lol.... No noticeable power. I remember seeing the dynos somewhere from people getting the cat-backs, it was nothing to jump up about.

To the OP, if you want cheap somewhat interesting performance... remove the baffels inside the intake and all of the screens. Its somewhat noticeable for about ehhhhhhh a day maybe. I modified my inlets for my intake.. took out the housing, opened them up and extended them.