MBRP 2012+ Jeep Grand Cherokee SRT 6.4L 3in Dual Rear Exit Aluminized Catback Exhaust - T304 TipsOur 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. Cat Back Performance Exhaust System; 3 in.; Aluminized Steel; Dual Rear Exit; W 5 in. OD. Tips; 5" OD Tips Included.