This prop had little bit of cup added to help lift the boat. I ran it on a pantera 200 EFI 2 times after the work was done. I broke my wrist after that and have not fished since. Because of my wrist I am going to a four blade to make it easier to drive even though I know that I will lose top end. If you will e-mail at dcheney@cableone.net I will reply with pictures.