R1802 Rain Cap - 2 1/2" Fits CaseOne New Aftermarket Replacement Rain Cap 2 1 2" for John Deere, Case, Ford New Holland, Massey Ferguson, International Harvester, Allis Chalmers, Oliver, and More This 2 1 2" exhaust weather cap (rain cap) mounts on the top of a vertical exhaust stack and protects the muffler and engine from rain, dirt, dust, and debris when the tractor is not running. The hinged flap opens automatically under exhaust pressure and closes at rest. A universal fit clamp