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The USTL-734 kit is designed to replace the spare tire location. Triple train horns, air compressor and 3-gallon air tank all mount on a custom bracket that is secured by the OEM spare tire winch. Easily inflate 37″ tires, power air tools, and blast your Kleinn train horns to incredible levels! This kit is 100% Bolt-On and requires no drilling, welding or vehicle modifications. The kit includes the Demon™ model 730 spun steel triple train horn, which produces an earth-shattering 157.8 dB!