The prop is a bravo 4 blade 28, Its not stock but I do not know whats done to it. I just got a couple of stock ones from b blades to start testing. The drive is a 1.27, or something ratio(b max drive).The engine is a GM 454 block bored out to 468.Heads are dart 360s with some extensive work done to them. Cam is a custom grind by ultradine. 8-71 bds blower with a chiller. Carbs are custom also from quick fuel. CMI dry exhaust. Nothing to crazy just a good combination of really good parts. It was assembled and dyno'd by Pat Musi Performance. It has been holding up great, broke a vertical shaft in the drive in less than 2 hrs. just before jotj run. I think I had a bad shaft , new one seems to be holding up. After the blue printing the boat handled great. After all it is a Active Thunder!