The Walker Exhaust 21366 muffler 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 aluminized alternatives, ensuring a longer service life. The internal drainage system effectively reduces moisture collection, further enhancing durability. Designed for easy installation, it features a direct-fit bolt-on replacement with 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 changes, minimizing distortion and maintaining structural integrity. Spun-locked heads and OE-style spot welds contribute to its stability and extended lifespan. 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. Acoustic and flow testing validate its design, ensuring reliable performance. The muffler's specifications include a body height of 5.5 inches, body length of 20 inches, body width of 11 inches, inlet offset of 3.5 inches, inlet quantity of 2, inlet type of 2 bolt loose flange with spherical flare, outlet quantity of 1, outlet type of pipe connection, overall length of 31.625 inches, and a shape of oval. The inlet inside diameter is 2.5 inches, and the outlet outside diameter is 2.25 inches. This muffler is compatible with various vehicle models, including the 1998-2001 Ford Explorer and Mercury Mountaineer. By choosing the Walker Exhaust 21366 muffler, you are investing in a high-quality component that enhances your vehicle's exhaust system performance and longevity.