Genuine OEM Nissan intake manifold, part number 1400300Q4B. This part is responsible for distributing the air-fuel mixture or air into the engine's cylinders. Its precise design ensures optimal airflow and combustion efficiency. The internal passages and mounting surfaces are critical for engine performance and emissions control. Genuine OEM intake manifolds are manufactured to exact tolerances, guaranteeing proper fitment and airflow characteristics necessary for smooth engine operation and maximum power output.