All of our tunes are engineered from many hours of datalogging the car on the dyno as well as on the street.  We don't believe in piggy backs to trick the ecu in doing things that we can do with the OEM software!  We customize every tune for the cars current mods, as well as the local elevation and fuel type!  We also offer a money back guarantee on all products as well as FREE retunes if you ever change mods for the lifetime you own the car!