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. Black Series Cat Back Exhaust System; 3 in.; Incl. Extension Pipes/Muffler/Over Axle Pipe/Tailpipe/Hardware/3.5 in. OD Tip; Single Side Exit; Black Coated; 4" OD Tip Included