The Walker Exhaust 54977 11" x 5.5" x 15" Stainless Steel Exhaust Muffler Assembly is engineered to provide a durable and efficient solution for your vehicle's exhaust system. Constructed with 100% stainless steel, this muffler offers superior corrosion resistance compared to traditional aluminized mufflers, ensuring a longer service life. The internal drainage system effectively reduces moisture accumulation, further enhancing durability. Designed for easy installation, the 54977 features a direct-fit bolt-on replacement with OE-style hangers, brackets, and pipe routings, eliminating the need for specialized fabrication or welding. Its internal partitions and mechanically joined tubes allow for expansion and contraction during temperature fluctuations, minimizing distortion and maintaining structural integrity. The spun-locked heads and OE-style spot welds contribute to the muffler's stability and extended lifespan. For optimal acoustic performance, the 54977 incorporates OE-style louvered tubes that lower noise levels, while the OE-style domed heads help reduce radiated noise, delivering a premium factory-style sound quality. Acoustic and flow testing validate the design, ensuring consistent and reliable performance. Backed by Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound® Guarantee, the 54977 muffler assembly is a reliable choice for maintaining your vehicle's exhaust system.