I would agree with you, but when I pulled the last bolt out there was no resistance from the gasket. I did put high temp bearing grease on the flange, but there was no stuck residue from the gasket. I'm going to disconnect it again and inspect it just to make sure. When I undid the plastic part I disconnected the 3/4 od hose from the valve cover and rotated the whole assy out of the way without undoing the connectors. Installed new TB, rotated back in place and connected the hose back up. I might get a new gasket just to be safe, but didn't have one on Sunday afternoon. Seems to run ok.