So back to this thread, after a couple of tanks of gas the boat is faster and has a much better hole shot. I can run 55 mph if all is right, half a tank, only me in the boat and wind at my back and messing with the trim for about two or three min. At the end of the day this prop is faster. Was it worth the $500 for the extra MPH? Not really but I did need a new prop and it does look fancy on the back of my boat, lol. I am still in the RPM range for the motor as I run at 4600 RPM and the range is 4400 to 4800.