MagnaFlow 99656HM Universal 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. Has a 5 inches diameter housing Features significantly larger catalyst volume and greater concentrations of catalytically active materials Inlet/Outlet: 2.5 inches