MagnaFlow direct-fit catalytic converters are designed for easy bolt-on installation for the professional installer. Each is designed to exact the original equipment specifications. While the majority of the direct-fit catalytic converter products do not require welding, cutting or bending, limited applications may require additional welding for optimal installation. All California state catalytic converters are torca compliant. Converters in this catalog are based on executive orders issued by the California air resource board and must be used in accordance with this information. In California, it is illegal to select a catalytic converter for installation based solely on vehicle weight and engine size.