The Peterbilt D3S 12.17 Inch Exhaust Flex Hose is a reliable and practical solution for your exhaust system needs. Made in the USA with stainless steel construction, this hose is built to last. With a 4-1/2 inch outer diameter and 3-5/6 inch inner diameter, it fits most Peterbilt makes and models. It is directly replaceable with OE parts, making installation hassle-free. Each hose comes with clamps and gaskets included, ensuring a secure and leak-free connection. With direct OE replacement numbers M66-7091-0335 and OTR58537, you can trust in the quality and compatibility of this product.