Question #3 is of course yes unless you are of the opinion that the greatest engine builders in the world created a new engine that was already at 96% maximum output. With so little room from the header point out its possible that the exhaust is one big H-pipe after the collectors and includes both the catalytic and GPF functions. I think this would make a deeper hollow sound as opposed to a shrill peaky sound. By the way, that engine has at least another 100hp in it is my opinion and its up to Ferrari if they want to evolve it to there. Perhaps not these days with all the clamor about electrics. We'll see.