Demon horns, Blastmaster valves and manifold. Loudest setup Kleinn has. Took these off my truck which I sold. I ran them for about 18 months, so there is some surface wear but they function perfectly, and very loudly. Valves take 1/2" air brake line, easily had in Amazon or whenever. Obviously need compressor and tank, not included. Over$630 new, back ordered on Kleinns site. Asking 475$.
email me at stbrightman@gmail.com.