You have to use the 2bular gasket. The exhaust port cutouts are larger than the Toyota gasket. I had bought the headers long before Jim sent the gaskets out and I had to use the Toyota one not knowing about the port size issue. Anyway, when I finally did swap out the gasket for the 2bular version, I put them one on top of the other and definite difference in port size. Also, because the Toyota gasket port is smaller, you could see all the soot on the outer perimeter of the port cutouts because they are smaller. So you'll most likely have leaks from the flange as well because of this, as I did.