Gorgeous 2020 BMW M4 Comp in for Stage 1 ECU tuning, we have done extensive testing and development over the years and having had several ourselves we know they deliver and even more savage punch when tuned.

Stock power measured : 479bhp / 634nm

Stage 1 Tuning : 512.9bhp / 742nm

#mapro #bmw #m4 #competition #dynoproven