Information?? High quality chassis partseries products. Made with high strength steel tubing for superior strength and durability. Stable performance, reliable quality and long service life Uniform thickness, no blow holes, slag, cracks, tearing, or incomplete fusion. Measured by specialized inspection tools after welding to make sure assemble hole , bushings insert, and installation sizes are proper. Professional InstallerisHighly Recommended(No Instruction Included) Alignment Highly Recommended After Install Inlet: 2.5″ Inside Diameter Outlet: 2.5″ Inside Diameter Shell Material: Stainless Steel Substrate: Ceramic Type: Semi-Universal Does NOT Fit models with California,New York,and Maine. Emission Standards Not legal for sale in CA,NY and ME. If your vehicle is registered in these areas, do not purchase this part. If your vehicle meets the requirements, but is not registered in these areas, this converter will work on your vehicle.Compatibility Chart?? Universal FitPackage Content?? 2x Universal 2.5″ Catalytic Converters