Go to AbsolutePrelude.com and search all threads for NtPrelude and TrboH22.

Unfortunately we got hacked 2 months back, but NtPrelude had been steadily creeping up into on the 400WHP mark for some time, for some reason the number 393/230 sticks in my mind, hence IIRC (if I remember correctly) I think TrboH22 had $33k in his car, so...12K for the engine is not out of line.