Hp tuner version 5.1.58 is available, tested and its matters are fine, God willing. It is a program that allows you to modify files and program all American cars for: - Speed limiter removal - Throttle response - Fuel mixture tuning - Popcorn limiter - Fan control - Performance tuning And all American engine programming. Other new versions are also available. The program is downloaded remotely to the client via TeamViewer.