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18. When it comes to port-matching a manifold to your heads, there are a few things you need to know before you start. From left to right we have a course-grinding tip that will be used to remove all the material and get the shape right. Then the fine will be used to remove the chip marks left by the course tip. Then a sandpaper roll will be used to smooth out the finish even more and lastly will be a flapper tip with some sandpaper to produce the proper texture.