G-Power has finally developed a performance upgrade which is manageable by man and machine. We have known G-Power for creating the world’s most powerful and fastest BMW’s out there but what if you don’t want to go completely over the top on your new M3 or M4? Well they have the answer and put simply it pumps up the output to M5 territory. An in-house developed Bi-Tronik 2 V2 ECU remap has allowed the tuners to extract 552 horsepower from the 3-litre turbocharged engine which makes it 127 hp up on the stock engine. To finish off the potent package, G-Power fitted some 21-inch Hurricane RR forged alloys (which actually reduced the weight).