The Kenworth 3S Flex Exhaust Bellow is a practical and reliable solution for Kenworth truck owners. Designed to fit most Kenworth models, this exhaust bellow is compatible with both OEM and aftermarket numbers, including M66-6542-0335, M6665420335, 58509, 58509KIT, and 58509-KIT. With its natural finish and 3S Flex type, this exhaust bellow offers durability and performance. Sold individually, it provides a cost-effective solution for maintaining and improving your Kenworth truck's exhaust system. Trust the Kenworth 3S Flex Exhaust Bellow to deliver the benefits of a quality product without compromising on practicality.