The Walker Exhaust 21640 Quiet-Flow SS Exhaust Muffler is engineered to provide a direct-fit replacement for the 2002-2004 Jeep Grand Cherokee, ensuring seamless integration without the need for specialized fabrication or welding. Constructed with 100% corrosion-resistant stainless steel, this muffler offers superior durability and longevity compared to traditional aluminized mufflers. Its internal drainage system effectively reduces moisture accumulation, mitigating the risk of rust and extending the service life of the exhaust system. Designed with internal partitions and mechanically joined tubes, the muffler accommodates expansion and contraction due to temperature fluctuations, minimizing distortion and maintaining structural integrity. The spun-locked heads and OE-style spot welds further enhance stability and contribute to a longer service life. For optimal acoustic performance, the muffler 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. The design has been validated through acoustic and flow testing, ensuring reliable OE-style sound. With an overall length of 30 inches, a body height of 4.25 inches, and a body width of 9.75 inches, the muffler features a 2.5-inch inlet and a 2.25-inch outlet, both with pipe connections. The aluminized finish provides additional protection against corrosion, making it a suitable choice for various driving conditions. This muffler is backed by Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee, offering peace of mind and confidence in its performance and durability.