Turner m sport ecu M5 M6 etc

here we have a piggy back ecu for the f10 M5 and others in that generation (m6 m8 etc) this like others tricks the dme into thinking there is less boost than there actually is. DME then raises boost and off you go. manufacturer claims an extra 90hp . also has a valet mode to bypass the effect . used on my f10 for several years with no issues .