performance horn, from silence to a meanfull menacing sound in 0.2 secs.

 

NOS powered.

 

i live in boston... horns don't work unless they're wicked loud. I mean i just want a horn that's louder and deeper tone preferably... yea i know i can go to the junkyard, but i'm not sure what model horn i should go with... any suggestions? I mean i don't go around testing horns...