Just a quick question. Is the upper intake plenum on the 03/04 cobra cast aluminum, or steel? I don't have one I can lay my hands on, and I'm just a little curious. Thanks in advance.
Not sure what u are asking.....you have the lower manifold on which the SC bolts on to (intercooler sits inside the lower, attached to the blower adapter plate). The the peice that the TB bolts onto is usually refered to as the plenum. Both the plenum, lower manifold, and SC adapter plate are all aluminum. Need any pics?