The Walker Exhaust 21367 Quiet-Flow SS Exhaust Muffler is engineered to provide a durable and efficient solution for commercial vehicle exhaust systems. Constructed entirely from corrosion-resistant stainless steel, this muffler offers superior longevity compared to traditional aluminized options. Its internal drainage system effectively reduces moisture accumulation, mitigating the risk of corrosion and extending the component's service life. Designed for direct-fit installation, the muffler features OE-style hangers, brackets, and pipe routings, eliminating the need for specialized fabrication or welding. This ensures a seamless replacement process, minimizing downtime and labor costs. The internal design includes partitions and mechanically joined tubes that accommodate thermal expansion and contraction, reducing distortion and enhancing structural integrity. Spun-locked heads and OE-style spot welds further contribute to the muffler's stability and durability. Acoustic performance is optimized through OE-style louvered tubes that lower noise levels, while domed heads help reduce radiated noise, delivering a premium factory-style sound quality. This design approach not only meets but exceeds OE standards, ensuring consistent and reliable performance. The muffler's specifications include a 3.00-inch inlet diameter, a 2.75-inch outlet diameter, and an overall length of 39.875 inches, with an inlet offset of 2.625 inches. These dimensions are tailored to fit specific vehicle models, including the 1996-2000 Chevrolet Express 1500, 2500, and 3500, as well as the 1996-2000 GMC Savana 1500, 2500, and 3500. By integrating the Walker Exhaust 21367 Quiet-Flow SS Exhaust Muffler into your fleet's maintenance program, you can enhance vehicle performance, reduce maintenance intervals, and ensure compliance with noise regulations, all while benefiting from a cost-effective and reliable exhaust solution.