Intake Manifold: Description and Operation

^ The intake manifold is a two-piece design. The upper portion is made from a composite material and the lower portion is cast aluminum.
^ The throttle body attaches to the upper manifold.
^ The lower manifold has an exhaust gas recirculation (EGR) port cast into the manifold for mixture. The EGR valve bolts into the lower intake manifold.
^ The Central Sequential Multiport Fuel injection (SFI) system uses multiple injectors to meter and distribute fuel to each engine cylinder. The Central SFI is retained by a bracket bolted to the lower intake manifold.
^ The fuel meter body also houses the pressure regulator. Metal inlet and outlet fuel lines and nylon delivery tubes connect to the Central SFI unit.
^ The delivery tubes independently distribute fuel to each cylinder through nozzles located at the port entrance of each manifold runner where the fuel is atomized.