MBRP 2003-2007 Chev/GMC 1500 Classic 4.8/5.3L EC/CC-SB Cat Back Dual Split RearOur 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. Installer Series Cat Back Exhaust System; 2 1 2 in.; Incl. Extension Pipe Muffler Driver And Pass Over Axle Pipe Tailpipes Hardware 3. 5 in. Tip; Dual Split Rear Exit; Aluminized; 3. 5" OD Tip Included