The Evolution Line exhaust system is elaborately manufactured of high-quality titanium, partially by casting processes. It gives the BMW M3/M4 more power and torque, at the same time reducing the weight by 11 kg (28 per cent). Thanks to the relatively bigger pipes compared to the series model, the exhaust gas pressure has been reduced. When designing, great emphasis was also laid on a deep, sporty sound. The appearance of the system is characterised by the concise tailpipes of carbon fibre and an elegantly formed carbon diffuser.