The HP Tuners vcm suite is the most feature rich, powerful and comprehensive vcm/PCM reprogramming and diagnostics package available on the market today. Vcm suite is the ultimate tuning tool designed for basic Tuners to advanced tuning shops. Each vcm suite comes with 8 credits which will allow you to tune 2-4 vehicles. Extra vehicles may be tuned by purchasing additional credits. The vcm suite is a comprehensive vcm/PCM programmer and parameter Editor. Vcm editors flash utility allows modification of All parameters such as spark, fuel, RPM limits, fan temps, transmission shift points and pressures, speedometer settings and many, many more. The Editor provides an easy to use graphical interface and many powerful table manipulation capabilities.