Engine performance upgrades??

A freind and I were talking the other day about why there doesn't seem to be very many companies offering wake boat engine performance upgrades. Maybe I'm wrong, but it seems like there would be a market for this. Especially the guys loading their boats with 2k+ lbs of ballast. I'm sure lots of people out there have performance mods on their tow trucks, exhaust, intakes, chips, superchargers, etc. Maybe everyone is happy with the power output of their boat. For me you can never have too much power, whether its your truck, boat, or lawnmower. Does anyone here have any mods done to their wakeboat engine? Would you want more horsepower if you could get it?