It's a eaton m112 i have read in america they are spinning them faster and pushing them above 10 psi without a intercooler, but thats crazy i have an intercooler but i am just waiting to get my bently vr6 manual before i start work i plan on replacing the head gasket also. To be honest i am in above my head i am happy with a vr6 engine but when it comes to the supercharger its all new territory to me