The Freightliner 15.6 Inch Stainless Steel Exhaust Bellow is a practical and reliable product designed to enhance your vehicle's exhaust system. With a 4-4/5 inch outer diameter and 4 inch inner diameter, this exhaust bellow is constructed from high-quality stainless steel, ensuring durability and longevity. Measuring 15.6 inches long, 4.96 inches wide, and 4.96 inches tall, it is a direct OE replacement for Freightliner makes and models. With exhaust emission norm EPA 07 compliance and direct OE replacement numbers 428578000 and OTR3FE011, this exhaust bellow is a perfect fit for your vehicle.