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MTM301-104 - Mast M-120 WBO2 ECM

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Item has been discontinued and is no longer available


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.

Application List



  • 301-104
  • 301-104
  • Mast Motorsports
  • Item has been discontinued and is no longer available
  • New


Shipping Information

  • Item Requires Shipping
  • 2.2 lbs.

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