Cathedral Port vs Rectangular Port, a rivalry that is almost as heated as Oval vs Rectangular in the Big Block Chevrolet world. But has anyone actually done the real testing to prove that one is better than another on a Turbocharged GM LS Engine? As a matter of fact, someone has. That someone is Richard Holdener and he’s put together a test that will surely get people talking and arguing and fighting over which one is better and why. Some of you will likely tell him he’s wrong and you’ll explain how much smart you are and how much better your test would be. Well bring it. In the meantime, take a look at the test Richard just put together in the video below.