The Walker Exhaust 18160 26.5" Overall Length Oval Exhaust Muffler is engineered to provide a reliable and efficient solution for managing vehicle emissions and noise levels. Constructed from aluminized steel, this muffler offers enhanced resistance to corrosion, thereby extending its service life compared to standard low-carbon steel alternatives. The internal drainage system effectively reduces moisture accumulation, further mitigating potential corrosion. Designed with internal partitions and mechanically joined tubes, the muffler accommodates expansion and contraction due to temperature fluctuations, minimizing distortion and maintaining structural integrity. Spun-locked heads and OE-style spot welds contribute to its durability and stability. The muffler's customizable design includes expandable bushings, facilitating easier fitment and potentially reducing installation time. However, specialized fabrication or welding may be required for certain applications. Louvered tubes are incorporated to attenuate radiated noise, delivering a factory-style sound quality that enhances the overall driving experience. The Walker Exhaust 18160 muffler is compatible with various vehicle models, including the 1987-1989 Chevrolet G30, Chevrolet G20, GMC G3500, and GMC G2500, providing a versatile solution for fleet maintenance needs. By integrating this muffler into your fleet vehicles, you can expect improved exhaust system performance, extended component lifespan, and consistent noise control, all contributing to the operational efficiency and reliability of your fleet.