The Caterpillar 4 Inch ID And 5 Inch OD Exhaust Bellow is a reliable and practical product designed to meet your exhaust system needs. With a 4-inch inner diameter and 5-inch outer diameter, it offers a perfect fit for most Caterpillar makes and models. Made from 409 stainless steel, this exhaust bellow ensures durability and longevity. It measures 5.79 inches long, 4 inches wide, and 4 inches tall, providing a compact and efficient solution. With direct OE replacement numbers such as 2071364, CTP49140857, and OTR4CE001, it can be easily replaced with original parts. Compliant with EPA 10 exhaust emission norms, this exhaust bellow guarantees optimal performance. Sold individually, it offers a cost-effective solution for your exhaust system needs.