We get this question quite a bit and felt the need to make a post on it AND a video! The short answer is that there is extra machining that goes into a MAK Billet-TEK Pontiac valve cover. The cover is about .300 narrower at the top of the cover and the bolt bosses are accentuated. All of the standard Billet-TEK valve cover features are available in the MAK version – logos, heights, and coating. For more detail or better views of the MAK version please watch the video below.