Cat exhaust adapters, such as part 3N-3015, are manufactured to the highest standards of quality to ensure reliable connections at the operating temperatures and environments seen by Cat engines. Cat exhaust adapters are used on the exhaust system of Cat engines. Attributes: • Flexible exhaust adapter • 4 hole flange mount • Length: 18 in (457.2mm) • Nominal Hose ID: 5 in (127mm)