Ok.. Ok... Its technicly not "true SD" jeeze.. Thats the term the designer uses to compare to the other stand alones and piggy backs. Alot of ems companys use the term "true SD". From what I can understand, dsmap uses the actuall signal from a map sensor based on the voltage, where link takes the map sensor reading and converts it to something the stock ecu can understand. Somthing like that. Im not gonn argue, the arguement is as old as Dsmlink is. Lol.