When receiving I seen people complain that it’s not what was pictured. That is a good thing you do not want what was pictured because the one that is pictured is junk. I know I’ve went through a few of them. This is an upgraded certified replacement. I was happy to see it redesigned and working like it should. No more pilot light not lighting or staying lit. This one fixed that. As for mounting. All ports are in same location so you don’t have to redo any gas lines. It’s plug and play. Thank you A+++