The technical term for that little nub of a port is the stinger. It is engineered a specific length, diameter, and exit point. Any changes made will have an effect on your performance. Most of the stinger extenders don't drag performance down much, and they make the engine quieter. I personally want every drop of power.(without toasting sleeves) I think a truck with some dirt in spots that are hard to clean has character. After a while the wheels get beat up around the bead, and start to get scratched up, so it isn't such a big deal if they get a little dirty. If you do use a stinger extender, cut it as short as you can and still divert oil from collecting on the truck to minimize the power loss.