The AP Exhaust 700051 Exhaust Muffler is a direct-fit MSL/MAXIMUM muffler designed to meet the stringent demands of commercial fleet operations. Engineered for seamless integration, this muffler ensures optimal sound control and back-pressure performance, aligning with original equipment specifications. Constructed from 100% aluminized steel, it offers enhanced durability and resistance to corrosion, thereby extending service life and reducing maintenance costs. The muffler's design features thick, expandable necks that facilitate easy sizing, streamlining the installation process and minimizing downtime. This product is compatible with a wide range of vehicles, including various models of Chevrolet and GMC trucks from 1979 to 1993, ensuring versatility across different fleet vehicles. By choosing the AP Exhaust 700051, fleet operators can achieve consistent performance, reduced maintenance intervals, and improved operational efficiency.