Lid

does the lid come with instructions on how to install and all hardware. I found some directions on the net but they made it seem so confusing. Everyone says it easy as hell.

Piece of cake.

Basicly the same as the stocker minus the giant baffles and much more smooth.

will i be able to feel a little bit of a differance?

8-10 RWHP.

Probably not much difference will be felt. Worth .1-.2 off your quarter though.
It takes a good amount of power to really 'feel' it.