Engine exhaust valve are exposed to severe thermal loads and chemical corrosion. Exhaust valve opens and closes 2000 times per mile for passenger cars. Generally the material for manufacturing exhaust valve and exhaust valve seat insert have properties for working at high temperature continuously and resistance to corrosion due to their surrounding environment. Usually engine valve is made up of austenitic steels. This valve is to be replaced by a light weight dissimilar materials preferably by an Al6061 and FE 430 steel. In this paper, computational fluid dynamic analysis of such valve is presented. The flow characteristics and strength of the valve are assessed.