The Kenworth / Peterbilt Bellow Pipe is a practical replacement for the M66-6559 OEM part. Designed to fit perfectly, this bellow pipe offers a reliable solution for your Kenworth or Peterbilt vehicle. With its durable construction and precise fit, this product ensures optimal performance and longevity. Sold individually, this bellow pipe is a cost-effective choice for maintaining your truck's exhaust system. Trust in its quality and compatibility to keep your vehicle running smoothly.