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Replace the faulty or old rear catalytic converter with the all new aFe power direct-fit rear cat replacement for the 2000-2003 Jeep Wrangler (TJ) with I6-4.0L engine. This cat replacement is constructed of 100% MIG welded stainless steel for strength and durability. This unit comes with a slip fit, clamp & 3/8" thick flange for a secure hassle-free installation. Stainless Steel Construction: This system is constructed of durable mandrel bent stainless steel tubing for maximum performance, corrosion resistance and strength, eliminating cracking. Factory Mounting Locations: Utilizes factory mounting locations and utilizes an OE style flange making it a true bolt-on system. Catalytic Converters: This kit comes with a 49-State federal approved catalytic converter for a bolt-on and go installation. aFe headers and exhaust are engineered and manufactured in our Corona, California manufacturing facility.