One New Aftermarket Replacement Rain Cap Assembly Fits Caterpillar (Fits CAT) Asphalt Pavers and Crawler DozersThis aftermarket replacement exhaust rain cap assembly mounts to the top of the exhaust pipe on Fits Caterpillar (Fits CAT) equipment powered by the 3116 engine. The cap seats over the exhaust outlet and opens under exhaust pressure while the engine is running, then closes when the engine is off to prevent rain, debris, and moisture from entering the exhaust system -- protecting against rust, corrosion, and internal damage during storage or downtime.Specifications Minimum Pipe Diameter: 88 MM (3.46 in) Maximum Pipe Diameter: 94 MM (3.70 in) Compatible ModelsFits Caterpillar Asphalt Pavers (AP / BG Series): AP-1000B, AP-1055B, AP-900B, BG-2455C, BG-260C, BG-240CFits Caterpillar Crawler Dozers / Track-Type Tractors: D3, D3B, D3C, D4C, 931B, 931C, 935CReplaces Part Number(s):7S4995, 7N4674-RAINCAP-KIT-KIT, 4N6639-RCKIT-KIT, ENJ80-0079Aftermarket Interchange Numbers4N6639 (mating exhaust pipe - sold separately)New aftermarket replacement part - not remanufactured, not used.