Induction system plays an important part in achieving high engine volumetric efficiency (VE). A good VE ensures good engine performance. Intake manifold is one of the crucial components in induction system that would evenly distribute the air charge into the cylinder. Flow variation between cylinders could cause low engine VE. This study conducted airflow measurement using a steady airflow rig to identify the flow characteristics. The test was conducted with 4 unit intake manifolds and a cylinder head. Valve lifts were swept from minimum to maximum. The main objective of this study is to select the best-delivered airflow intake manifold. Addition to this, understanding on flow characteristics is conducted and will be an input for 1D simulation
