Everyone has their opinion, thats why we have conflicts its all good and no one has patented anything so welcome to create more group buys etc. with the last flanges I got the ports where larger than I preferred compared to stock which made some corner between inlet and exhaust ports too narrow for welding and the thread holes where too large which left too much room for them moving around. Still all is a good effort by anyone trying to do something like this and we live and learn as we progress from previous efforts.