The 64 Inch Curve Top Stack with 8 Inch Reduced to 5 Inch O.D. Plain Bottom is a high-quality, chrome-plated exhaust that fits most truck makes and models. Designed with OEM quality, this stack is measured by the outer diameter and is sold individually. It is a practical and reliable choice for truck owners looking for a durable and stylish exhaust replacement. With its curve top design and reduced bottom, this stack offers improved performance and a sleek appearance. Upgrade your truck's exhaust system with the Lincoln Chrome 11112015BJJ.