The Curved Stack 5 Inch O.D Aluminized - 18 Inches is a practical and versatile product that fits most makes and models. With its curved design and 5-inch OD, it offers excellent performance and durability. Made from aluminized material, this stack is built to last. Measuring 18 inches in length, it provides the perfect fit for various applications. Whether you need to replace an old stack or upgrade your vehicle, this Curved Stack is a reliable choice. Sold individually, it offers convenience and value for money.