Ok this question really has no huge rush but I cant find the answer and its buggin me. On my trottlebody (twin 58mm for tpi) it has a cover on top, it is just a hollow void but it opens into the throttle body. There is a gasket and everything. I looked at the factory one also and it has the same opening. Im lost wtf is this for? Im guessing a diffrent application might need this open for a sensor or something? Im wondering could I fill in that hole and not worry about it? Thanks again