It is resistant to thermal shock and cracking,long service life. It is high corrosion and wear resistance.Main function is to convert gases, pollutants to harmless gases, helps to purify treat car exhaust.By using it,it can help to improve exhaust gas velocity, save horsepower and torque.Great emissions control,high efficient and work efficiently.Perfectly matched with the vehicle, and can be installed easyly to existing exhaust system, cutting and welding may required, professional installation is highly recommended.size: 3 inchMaterial: Stainless steelcolour: silverPackage Contents:1 x Catalytic ConverterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.