Review on 🔊 Loud and Powerful: Viking Horns V101C-3/4008 Universal Fit Train Air Horn Kit with 1.5 Gallon Tank and 150 PSI Compressor - Up to 149 decibels! by Jamie Behm

The beep is loud and the sound is good. But whether they flow, most likely from a braided steel line feeding the tank from the supercharger or somewhere on the supercharger. As most people point out, you will need a 10 x 1.0 tap or die to clean the threads. at the tank openings, as these are filled with black powder paint. But even after the entire system's threads have been thoroughly cleaned and properly sealed with good quality Teflon tape (not the cheap yellow Teflon that comes with the kit) and Loctite, it still leaks. The compressor is weak, but it eventually fills the tank up to 150psi.