bigger is not always better...
you can just get your stock manifold ported n polished along with the throttle body and then have everything port matched to each other and the head...this might cost a bit more than an aftermarket int.manifold, but it'll flow just as well, if not better (being that the runner length and angle of entrance to the head is designed to work efficiently with the head), and itll definitely have increased velocity.....but then again, if youre going turbo, youre creating your own velocity..so then you can just throw out my suggestion and go with a short fat intake runners and turn up the boost. naturally aspirated ownz joo!!!! :fawk: