<4G6-Non-Turbo>

    In the engine of 4G63-SOHC, a clam shell exhaust manifold with incorporated catalic converter has been adopted. The this has helped to reduce the time for activating catalyst when starting the engine and to reduce weight. The exhaust port of a dual method is adopted with in the engine of 4G64-SOHC and the exhaust manifold made of the stainless steel.

<4G6-Turbo>

    Since a turbocharger was carried, the exhaust manifold made from stainless steel was adopted.

    The exhaust manifold is design to reduce the heat capacity and to improve exhaust gas performance by piping the assembly.
The improvement in the engine performance is designed by preventing the exhaust interference through the dual piping. The improvement of the exhaust gas performance just after the engine start is designed through the quicker warm-up in the catalyst by installing MCC on the dual portion.
The weight reduction is designed by reducing the flange plate thickness.