The Walker Exhaust 48355 29" x 9" x 7" Stainless Steel Exhaust Muffler Assembly is engineered to provide a direct-fit, OE-style replacement for the Nissan Frontier models from 2003 to 2004. Constructed with 100% stainless steel, this muffler offers superior corrosion resistance compared to traditional aluminized mufflers, ensuring a longer service life and enhanced durability. The internal drainage system effectively reduces moisture accumulation, mitigating potential rust and extending the component's lifespan. Designed for straightforward installation, the muffler features OE-style hangers, brackets, and pipe routings, eliminating the need for specialized fabrication or welding. This user-friendly design facilitates efficient maintenance and minimizes downtime for fleet operations. The assembly incorporates internal partitions and mechanically joined tubes that accommodate expansion and contraction due to temperature fluctuations, thereby reducing distortion and maintaining structural integrity. Spun-locked heads and OE-style spot welds further enhance stability and contribute to the muffler's longevity. For optimal acoustic performance, the muffler utilizes OE-style louvered tubes that effectively lower noise levels, while OE-style domed heads help reduce radiated noise, delivering a premium factory-style sound quality. Acoustic and flow testing validate the design, ensuring reliable performance and consistent sound quality. Backed by Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound® Guarantee, the 48355 muffler assembly offers fleet operators a dependable and cost-effective solution for exhaust system maintenance, contributing to the overall efficiency and reliability of their vehicle operations.