MBRP S5104AL 3" Aluminized Cat Back, Single Side for 2004-2005 Dodge Ram Hemi 1500 5.7L SC/CC-SBOur 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; 3 in.; Incl. Extension Pipe Muffler Tailpipe Hardware 3. 5 in. OD Tip; Single Side Exit; Aluminized; 4" OD Tip Included