The Walker Exhaust 46921 6" x 6" x 20" Stainless Steel Exhaust Muffler Assembly is engineered to provide superior durability and performance for commercial vehicles. Constructed with 100% stainless steel, this muffler offers enhanced corrosion resistance compared to traditional aluminized options, extending its service life and reducing maintenance costs. The internal drainage system effectively minimizes moisture accumulation, further preventing rust and deterioration. Designed for easy installation, the muffler features OE-style hangers, brackets, and pipe routings, allowing for a direct-fit bolt-on replacement without the need for specialized fabrication or welding. This design ensures a seamless integration into existing exhaust systems, reducing downtime and labor expenses. The muffler's internal partitions and mechanically joined tubes accommodate thermal expansion and contraction, minimizing distortion and maintaining structural integrity under varying temperatures. Spun-locked heads and OE-style spot welds provide additional stability, contributing to the assembly's longevity. For optimal acoustic performance, the muffler incorporates OE-style louvered tubes that effectively lower noise levels, while domed heads help reduce radiated noise, delivering a factory-style sound quality. Acoustic and flow testing validate the design, ensuring consistent performance and compliance with industry standards. By choosing the Walker Exhaust 46921 muffler, fleet operators can achieve a reliable and efficient exhaust solution that minimizes operational disruptions and enhances vehicle performance.