Attention: Due to increased emissions standards, these items are not certified for sale in California, New York, Maine and Colorado. If your vehicle is registered in California, New York, Maine or Colorado , these items can not work on your vehicle. Please check your registration states before you buy. NOTE: Customers strongly advised not to install such parts on vehicles that will be driven on public roads. Specification: Product Name: Catalytic Converter Body Material: 409 Stainless Steel Substrate material: Ceramic Inlet/Outlet Diameter: 3" / 7.62cm inside diameter Body Size: 4" /10.16cm Round Overall Length: 11" / 27.94cm Engine Limit: 2.5L O2 Sensor Port: No Cells Per Square Inch (CPI): 400 Features: 1.100% Brand new never used or installed 2.It is resistant to thermal shock and cracking,long service life. 3.It is high corrosion and wear resistance. 4.Main function is to convert toxic gases, pollutants to harmless gases,helps to purify treat car exhaust. 5.By using it,it can help