These are some pictures of an experiment in progress. What we did was cut the intake plenums in half so we could port and reshape the entire intake runners and openings. I feel that this will work significantly better than simply extrude honing the manifoild. When the intake gets welded back together it will be milled and refinished and you will not be able to tell it was ever touched. I'll post some dyno results as soon as it's back together.