My LTD XF Roadster is getting 211.4 RWHP with the mods listed in my signiture. Everyone tells me there is about 20% power train HP loss, so that would make crank HP somewhere around 264HP. The car run great, but not SRT6 performance. I would love to do a Supercharger or Turbo, but they are so expensive. I have thought about adding a NOS kit to it, but don't want to kill the engine by over doing it. I think it somewhere between 243 and 254 crank HP.