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 : afe47-46101 Description : Direct Fit Catalytic Converter; Driver Side Front Left; Stainless Steel Construction; Factory Mounting Locations; Incl. Gasket/Hardware; Inlet Size (in.) : OE Converter Body Size : OEM Core Substrate Material : OEM Overall Length (in.) : OEM Emission : Non-California (49-State) Outlet Size (in.) : OE 2005-2010 Nissan Xterra Off-Road V6.3954cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 2011 Nissan Xterra PRO-4X V6.3954cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 2005-2011 Nissan Xterra S V6.3954cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 2005-2010 Nissan Xterra SE V6.3954cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 2006-2011 Nissan Xterra X V6.3954cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit