Replace the faulty or old rear catalytic converter with the all new aFe power direct-fit front cat replacement. This cat replacement is constructed of 100% MIG welded stainless steel for strength and durability. This unit comes with 49-State federal approved cats and 3/8" thick flanges for a secure hassle-free installation. PartNumber : afe47-48005 Description : Direct Fit Catalytic Converter; OE Replacement; 1 pc. Design; Retains Factory O2 Sensor; Core Substrate Material : OEM Converter Body Size : OEM Emission : Non-California (49-State) Outlet Size (in.) : OE Overall Length (in.) : OEM Inlet Size (in.) : OE 2003-2004 Jeep Wrangler Rubicon L6.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1999-2004 Jeep Wrangler Sahara L6.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1999-2004 Jeep Wrangler Sport L6.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 2002-2004 Jeep Wrangler X L6.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit