MWMods | Loweredbenz on Instagram: "The MWMods ECU Tune is a user-friendly device, it stores both MWMods Stage1/2 file and your vehicles STOCK firmware file and allows an unlimited ability to switch between firmwares . The module plugs directly into the OBD2 port and delivers the Stage1/2 file to the ECU, programming usually takes 1-3 minutes. The power increase is achieved by adjusting such parameters of the engine control unit as air/fuel ratio, ignition timing , throttle mapping and boost pre