Hey everyone when I bought my ski it came with a Solas YAM-YB-SC-I 14.5-18 stainless steel impeller. It also has all of these mods done to it Triton Engineering Head (185 psi), Red Top Dual 44mm Mikuni Carbs, Coffman Lightning Series Exhaust, Tau Ceti flame arrestors, Jet Dynamics Extended Ride...