The 120pin hardware is the newest addition to Mast’s lineup of the most advanced ECM’s for Gen IV LS engines. The M-120 ECM features Bank to Bank active wide band feedback control. This allows for easier in application tuning and the most accurate calibrations. All of Mast’s M-90 ECM’s advanced functions are retained including wide band knock, VVT control, full sequential fuel injection, and drive-by-wire throttle control. The ECM also adds active boost solenoid control for GM LSA and LS9 engine applications. The M-120 ECM is available with pre-programmed calibrations in both Calibrated and Performance packages.