nothing beats the sound of twins belching exhaust out the transom. but like I said before,
lets see a 260 hp IB push a boat over 100 mph.
Also F1 Drivers experience up to 6Gs in the turns. That aint gonna happen with a IB. As far as endurance. They run a 24 hour race for stock outboards at Roughan Rouhan Rougan (however the f%#k you spell it). Anyway, just keep burning up those motors, Job security.