Equip your vehicle with the Kleinn 141 direct bolt-on quad chrome-plated air horn system, featuring four compact chrome-plated zinc alloy trumpets measuring 12.5 inches, 10 inches, 7.5 inches, and 6 inches in length to deliver devastating truck air horn sound in a space-saving design. Engineered for universal application and small enough to fit in almost any car, truck, or sport utility vehicle, this premium quad horn configuration delivers a loud, full, and clean blast producing 150.3 decibels at 150 PSI. The high-performance kit comes equipped with a heavy-duty Vortex 4 Series Model 307 12-volt electronic air horn solenoid valve with a 1/4-inch OD airline input to ensure instantaneous air delivery and an extreme train horn sound right out of the box. Designed for a clean, professional, and hassle-free installation, this complete package requires an onboard pressurized air system and combines a glistening, corrosion-resistant chrome finish with maximum acoustic performance for builds with limited mounting space.