The Walker Exhaust 55586 Exhaust Resonator and Pipe Assembly is engineered to provide a direct-fit replacement for specific vehicle models, ensuring seamless integration and optimal performance. Designed for 2005-2006 Buick Terraza, Chevrolet Uplander, Pontiac Montana, and Saturn Relay, this assembly features a 17" body length and a 3.5" x 3.5" x 3.5" steel construction, offering durability and resistance to corrosion. The aluminized steel material enhances longevity, while the OE-style louvered tubes help reduce radiated noise, delivering a factory-style sound quality. The assembly includes thick OE-style flanges, hardware, and brackets, ensuring strength and ease of installation. This product is engineered to fit, perform, and sound like the original system, providing a reliable solution for fleet operations seeking to maintain vehicle performance and sound quality.