Who makes the loudest most realistic train horns for vehicles that doesn't require an on board tank? Hella? Buell? I like the Grovers but really don't want to go through the high expense, loss of bed space and time to run lines.

Reg

 

My brother has an air horn on his baja beetle. No tank required, its just a real small compressor that runs it... Id say the whole thing would fit inside a cigar box from what i remember.