A different design, build, and configuration from the stock system means the exhaust saves weight and optimizes the engine's power and torque levels, increasing both throughout the entire rev range, with increases of 6.4 kW at 6,400 rpm and 9.1 Nm at 6,700 rpm as measured in back-to-back runs on The Akrapovic dyno against a Mercedes-AMG A45 using a standard stock exhaust. The flow path of the exhaust gases provides tuning potential, which can be further enhanced with the addition of the optional Downpipe (SS).? The system is ECE type approved for cars equipped with an Otto/gasoline particulate filter, but, when installing the optional Downpipe (SS), the ECE type approval for the Evolution Line (Titanium) exhaust system is no longer valid. When ordering, please be aware that both part numbers, S-ME/T/6H and L-ME/SS/3, must be ordered because the system is split into two codes for packaging reasons. Fitment notice: This product can be fitted on CLA45 S Shooting Brake models. Please notice you must order the mandatory Control Kit. Control Kit for vehicles after facelift: P-HF1528 Control Kit for vehicles before facelift - P-HF1298