The Walker 21377 Quiet-Flow Stainless Steel Round Aluminized Exhaust Muffler is engineered to provide a direct-fit replacement solution for various Ford van models, including the E-150 and E-250 series. This muffler is constructed with 100% stainless steel, offering superior corrosion resistance compared to traditional aluminized mufflers. The internal drainage system effectively reduces moisture accumulation, thereby extending the muffler's service life. Designed for easy installation, it features OE-style hangers, brackets, and pipe routings, eliminating the need for specialized fabrication or welding. The muffler's internal partitions and mechanically joined tubes allow for expansion and contraction during temperature fluctuations, minimizing distortion and enhancing durability. Spun-locked heads and OE-style spot welds provide additional stability and longevity. For optimal acoustic performance, the muffler incorporates OE-style louvered tubes that lower noise levels, while OE-style domed heads help reduce radiated noise, delivering a premium factory-style sound quality. The design has been validated through acoustic and flow testing to ensure reliable OE-style sound. This product comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee, underscoring its quality and reliability.