QST BMW M2C/M3/M4 S55 ECU Software

Our ECU Software for the S55 Powerplant has been expertly developed on the dyno and tested vigorously on the road to provide a fully developed tuning solution offering exceptional gains in HP and Torque throughout the powerband and drivability exceeding expectations whilst still maintaining complete reliability as you would expect.

Stage 1:

-510HP

-680NM

Stage 2:

-530-545HP

-700+NM

Other features are available in our bespoke software, 'GTS' burbles, crackle on over-run and cold start delete.