Kleinn Air Horns SDKIT-734 Bolt-On Train Horn and Ultimate Onboard Air System for 2011-2015 Ford F-250 and F-350 Super Duty Diesel Trucks is a complete, bolt-on train horn. The 100% duty cycle onboard air system features a Model 730 triple spun black steel ABS train horn and 3-gallon US made air tank. It features all steel construction and is Cortec coated internally to protect against corrosion. Manufactured to SAE J10 and FMVSS 121 standards; 150 PSI rated system with 6450RC air compressor. Model-specific brackets for air system, horn and horn support included, as well as the tire inflation kit. Too Loud? Too Bad.