The Kenworth Chrome Replacement 7 O.D Inch Pipe Reduced to 5 Inch Right Side is a practical and efficient solution for newer Aerocabs with DUAL Round Catalyst/Mufflers Mounted Underneath. This product replaces the Kenworth Part # M66-1270CP and is designed to fit most Kenworth makes and models with a 40 Inch Battery Box. Its features include a chrome finish and a reduction in pipe size, ensuring optimal performance. With its high-quality construction and compatibility, this product offers a reliable and durable solution for your Kenworth truck.