2 inch pipe vs 2 1/4 inch pipe

I love how guys like to argue what they don't know/ask advice on after there shown the answer via exhaust company web site suggested pipe size charts, been there done that guys and dyno tested items.

They'll find one little item, obscured text somewhere and shove it in your face as if you and everybody else is wrong/ do not know what there talking about/the dyno is busted, your gas gauge is busted, you short filled the tank of gas on your MPG test. etc......