4.3 OPTIMIZATIONIt is a systematically approach used to find out the best possible results among the various possible values. In recent years it plays a vital role to enhance the technological growth in all fields. This approach improves the method of selection parameters in each and every level of selection process. In automobile field it increases the effective selection of component materials and its geometrical structures among the various available resources.1. Material Optimization2. Shape optimization.4.3.1 Material optimizationIt mainly concerns with the selection of best and suitable material for a particular application based on its performance requirements (light weight, higher thermal conductivity, etc.) In this project material selection plays a vital role to achieve the required performance (reduced emission values).1n order to achieve this reduced emission values laminating materials are introduced to absorb the carbon particles inside the catalytic converter. Presently the material it’s obtained to considering the most of material shown in Ceramic type material.