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™ Turbo Back Exhaust System; 4 in.; Incl. Down Pipe/Mid Pipe/Ext. Pipe/Muffler/Tailpipes/Hardware/5 in. Tips; Dual Split Rear Exit; T409 Stainless Steel; 4" turbo downpipe, 5" OD tip included "Not for use on vehicles equipped with Catalytic Converter"