These are actual miles on the car, not miles after a rebuild. I am the second owner, the first owner had a nitrous system on the car, as he said that he put on all his vehicles. He did use the nitrous system a few times. I had the car checked by aseveral mechanics when I purchased it and there was not evidence of extreme use of the nitrous on the motor. I returned the car to stock and used it as a show car. The only issue that I have is with the factory skip shift. This sometimes forces the driver to shift from 2nd to fourth gear. Please feel free to contact me for any other questions. This WS6 will not disappoint. The only reason that I am selling is because I have too many vehicles and I am down sizing and in need of garage space.