Be careful getting your old exhaust pipe out of the manifold, use heat and penetrating oil.

International Harvester Case IH Farmall Cub exhaust pipe. This is the pipe that threads into the exhaust manifold for the upright standard exhaust system. It is a piece of 1" I.D.(approx. 1-5/16" outside diameter) black iron pipe with standard pipethread. This is the pipe to which the muffler is attached. The pipe is 15" long in order to give good height to your muffler. If you like the muffler in a lower position, simply cut the pipe shorter with a hack saw.