Mazda 6 3.0L V6 (2003-2005) Catalytic Converter Manifold Set : Front (Radiator) and Rear (Firewall) Side - Not For California Emission Vehicles All stainless steel construction. High performance, perforated stainless steel heat shield Stainless steel manifold gasket included. No welding, adjustments or any modifications to the exhaust system Not for California Emission Vehicles. Not legal for sale to California