For some stepped vee-bottom hulls, adding the lab finish will improve the ride and efficiency. For multi-engine center consoles, the Lab Finished Revolution 4 can provide a needed gain in rpm thanks to the thinner blades. Compared to a Pro Finished Revolution 4 XP, the Lab Finish will add 100 to 150 rpm at WOT. The Lab Finish is the ultimate Revolution 4 for those who seek the highest top-end speeds.