Equip your vehicle with the Kleinn 102-1 direct bolt-on dual black air horn system, featuring two all-metal trumpets measuring 15 inches and 12.25 inches in length with 3-inch bell ends. Engineered for universal application and compact enough to fit in almost any vehicle, this premium truck horn configuration is finished in Kleinn's exclusive XCR2.0 satin black corrosion-resistant coating to withstand the harshest environments while delivering an earth-shaking blast of up to 149.1 decibels at 150 PSI. The high-performance kit comes equipped with a heavy-duty Vortex 4 Series Model 307 electronic solenoid valve for 1/4-inch airline compatibility to ensure instantaneous air delivery and an extreme truck horn sound right out of the box. Designed for a clean and simple installation, this complete package requires an onboard air system and combines a stealthy, durable black finish with long trumpets for a deeper, authentic railcar tone that serious custom vehicle builds count on.