MBRP 2003-2007 Chev/GMC 1500 Classic 4.8/5.3L EC/CC-SB Cat Back Single Side AL P Series ExhaustOur 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. This Part Fits: Year Make Model Submodel 2003 Chevrolet Silverado 1500 Base 2003 2006 Chevrolet Silverado 1500 LS 2003 2006 Chevrolet Silverado 1500 LT 2003 Chevrolet Silverado 1500 WT 2004 Chevrolet