The Nathan AirChime K5LA is the godfather of all train air horns! Still in use today, the Nathan AirChime K5LA is used on commercial locomotives all around the country. This Nathan AirChime train horn is of the highest quality construction and guarantees amazing performance! The K5LA incorporates five heavy-duty die-cast kettle drum bells with a high flow five-way manifold. The K5LA horn is the real deal: not only is it the loudest horns we’ve ever sold, but a genuine locomotive air horn. It doesn’t imitate the sound you hear from diesel locomotives; it is the sound you hear from diesel locomotives. You’ll be heard for miles with a set of these horns!