Lexus ES350 Intake Manifold routes filtered air or air mixed with fuel to cylinder head ports with balanced flow that maintains lively acceleration and efficient fuel consumption. Early ES350 versions were based on aluminum dual section manifolds sealing to the heads with gaskets, while recent Lexus models adopted the lighter composite plastic, reducing weight and keeping the incoming charge cool for better combustion. This system of the Lexus has changed with each ES350 update, but the duties of the Intake Manifold remain the same, whether the engine is utilizing multiport injectors at each engine runner or Gasoline Direct Injection where only clean air is sent. Smooth runners make use of the Helmholtz resonance and in variable length systems change the path distance to increase low rpm torque then maintain top end power. The two-piece design has gaskets and bolts to prevent vacuum leaks or oil seepage, coolant passages may have temperature sensors, and there is a solid seal to maintain correct mixture ratios. An Intake Manifold may also contain the thermostat mount, and an additional Intake Manifold temperature sensor inputs information to the computer. Routine gasket integrity allows the Intake Manifold to keep silently supporting all Lexus ES350 drives.
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