I don't think its bs at all there's a guy on the NSX boards NSXPrime that has a 95X with over 120k stock bottem end, stock heads, stock trans, Gt35R (big turbo LOL) and all of the basic things needed for a turbo setup nothing special. Ohh and a stage 3 clutch and flywheel. He ran a 10.78@136. The cars I see doing that are right around 500wheel plus. So I would say that kit is very on target.
-Taylor