Used it on my truck, worked great. I would not put it on a 2 stroke though- meth could wash the oil film off and your also putting water into your steel crank bearings....
There is no parts available, I just took mine apart yesterday. Powderlites will sell the cartridge for $1100 or the whole turbo for $1500. They also have a roto-master cartridge that they claim is the same for $700. Oh and i don't recomend dissassembling it, took me half the afternoon to get it...