MagnaFlow 23556 Direct Fit Catalytic Converter (Non CARB compliant) Stainless steel construction Federal emissions compliant design Formulated for gas and diesel applications Seam welded close to the converter body for a strong, tight bond Made in U.S.A. Main Piping Diameter - 2.5 Inches / Catalytic Converter Inlet Diameter - 2.5 Inches Catalytic Converter Outlet Diameter - 2 Inches