Weistec M156 Fuel Rail

The Weistec M156 Fuel Rail is a high-flow component engineered to support the increased fuel demands of performance M156 AMG engines. As a key part of the Weistec Stage 3 Supercharger System, it is designed to help unlock substantial power gains, with the system as a whole capable of delivering up to +289 HP and +187 TQ over stock. This fuel rail is specifically intended for race-only applications. Its installation necessitates several supporting modifications to ensure proper function and engine longevity. These include the installation of a high-flow exhaust system, the removal of secondary air injection valves, the use of ROW airboxes, and the integration of specific spark plugs. Furthermore, Weistec strongly recommends a built transmission to handle the increased power output. The Weistec Stage 3 Supercharger System, which this fuel rail is part of, is not legal for sale or use on pollution-controlled motor vehicles. The system is designed for vehicles equipped with the M156 engine family, including models such as the C63, E63, CLS63, CL63, ML63, CLK63, S63, SL63, and R63 AMG. Specific vehicle applications for the Stage 3 Supercharger System, and by extension the fuel rail, include the 2007-2011 Mercedes-Benz SL63 AMG Roadster (R230), the 2007 Mercedes-Benz R63 AMG Base (W251), and the 2011 Mercedes-Benz ML63 AMG Base (W164), all featuring the 6.2L V8 (M156) engine.