MBRP S5148P 3" Cat Back, Single Side Exit for Dodge Ram Hemi 5.7L, 2003-2013 2500/3500, 2006-2008 1500 Mega CabOur 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. P Series Cat Back Exhaust System; 3 in.; Incl. Front Pipe Ext. Pipe Muffler Over Axle Pipe Tailpipe; No Tip Included; Single Side Exit; Aluminized; No tip included.