I have the v spec and its unreal. i just got in my JP Mod B5N which is a novarossi. I cant even begin to describe what this thing does. It awesome has more of a liner, very smooth acceleration, extremely easy to tune, and it has more torque than the V spec. besides I know several that have 7 gallons plus in theres with plenty of pinch left. So Im gonna try it out as well. I also know that the V spec like the JP1 pipe a whole lot better than the JP2.