Our high flow performance exhaust systems maximize exhaust flow so your engine keeps its cool with lower exhaust temperatures. Your reward will be greater fuel efficiency; more torque; more horsepower; and last but not least a sound that is pure MBRP. XP Series Cool Duals™ Off Road Exhaust System; 4in.; Incl. FrontPipe/Ext.Pipes/Muffler/Tailpipes/Over Axle Pipes/Hardware/5 in. Tips; Dual Split Rear Exit; T409 Stainless Steel; 4" front pipe, 5" OD tip included "Not for use on vehicles equipped with Catalytic Converter" ( 2002-2004 'Clean State' [California] has a Catalytic Converter)