The Peterbilt D3S 18.7 Inch Exhaust Flex Hose is a high-quality product designed to enhance your vehicle's performance. With its stainless steel construction, it ensures durability and longevity. This exhaust flex hose is 18.7 inches long, with a 5-inch outer diameter and a 4-inch inner diameter, making it compatible with most Peterbilt makes and models. It is a direct OE replacement, providing a hassle-free installation process. Made in the USA, this product is environmentally friendly and comes with clamps and gaskets included. Replaceable with OE parts, it guarantees a perfect fit. Direct OE replacement numbers are M666116 and OTR5EA002.