My buddy was making a mancave out of his garage and I had his old Entertainment stand in mine. Last night I had to jump my old GMC van so we could move it over to his house. I hooked up my car to it and started revving it until I had the manifold glowing a slight red. I have a DC Sports 4-1 Header on it, and I noticed that only 2 3 and 4 were glowing with the port from one not glowing at all. Why is that? I thought it was pretty cool as I was standing there under the hood revving it up. Oh and so far the cheap ebay manifold gasket is holding up pretty damn well, considering its been nearly two years since I put it on there.