The Paccar Bellow Kit is a reliable and practical solution for Paccar truck owners. Made with 321 stainless steel construction, this kit includes a 4-inch diameter, 15.9-inch long bellow, a 4-inch diameter flange and flare, as well as one bellow, two rings, and two clamps. Designed to fit most Paccar trucks, this kit compares to OEM numbers M66-7091-0405 and M66-6541-0405. With its durable construction and comprehensive components, the Paccar Bellow Kit ensures optimal performance and longevity for your truck's exhaust system.