Super Loud Dual Trumpet 140+db Truck Air Horn & VIAIR 275c 150psi 1 Gal. Kit Super Loud 140+db Dual Trumpet Air Horn Kit Heavy Duty VIAIR Compressor/Tank Kit-Everything you need in 1 Kit. GREAT for CARS, Trucks, RV's, UTV's, Boats...ANYTHING 12v!! VIAIR 150psi On Board Kit w/TRUCK Horn-BEST on the Market Complete with Install Instructions & 1 Year VIAIR Warranty