The Freightliner And Western Star 13.8 Inch Stainless Steel Exhaust Bellow is a practical and reliable product designed to enhance the performance of your vehicle. With a 6 inch outer diameter and 5 inch inner diameter, this exhaust bellow is constructed from high-quality stainless steel, ensuring durability and longevity. It is 13.8 inches long, 6.1 inches wide, and 6.1 inches tall, making it a perfect fit for most Freightliner and Western Star makes and models. This exhaust bellow is directly replaceable with OE parts and meets the EPA 10 exhaust emission norm. Sold individually, it is a direct OE replacement for numbers 04-28675-000 and OTR3FE008.