5POST member delvek reviews his Hartge ECU remap for the 550i, which he had performed on site at Hartge's facilities. Hartge's official stats for their 550i ECU is 360 kW (490 hp) / 5500 rpm 720 Nm (lb-ft 531) / 6400 rpm.
The results? The Hartge engineers were able ... CONTINUED
12 years ago
