removing that cross over changes the sound, and isolates each cylinder. So you can hear or do an exhaust gas test with out the minor effects of the other side. For the most part its extra work for nothing.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe