Attention Ford F-150 owners with the 4.6L V8 engine from 2001 or 2002! This is a direct-fit exhaust manifold catalytic converter kit designed to replace your old units (reference part numbers 645412 and 645413). It includes both the manifold and the catalyst in one assembly, making installation smoother. The converter body is made from high-quality stainless steel for better heat resistance, durability, and corrosion protection. Inside, it contains precious metals like platinum, rhodium, and palladium to effectively reduce harmful emissions and meet EPA performance standards (please note: EPA-compliant converters cannot be sold or installed in California, Colorado, and under some rules in Maine and New York - check your state's regulations and your vehicle's emission label). This is a direct bolt-on replacement, so it should match your factory setup without modification. Always ensure your exact year, engine, and model match before purchasing. We offer a 12-month quality guarantee for peace of mind. If you have questions or issues, contact us - we aim to respond within 48 hours. Keep your truck running clean and efficient!